Jezki (foaled 8 March 2008) is an Irish Thoroughbred racehorse who competes in National Hunt racing. After showing promise in National Hunt Flat races he won five times as a novice hurdler in the 2012/2013 season, with his victories including the Fishery Lane Hurdle, Royal Bond Novice Hurdle, Future Champions Novice Hurdle and Evening Herald Champion Novice Hurdle. In the following season he won the WKD Hurdle and the Hatton's Grace Hurdle before taking the 2014 Champion Hurdle at Cheltenham Racecourse and following up with a win in the Racing Post Champion Hurdle. In the following season he was beaten in his first three races by Hurricane Fly and finished fourth to Faugheen in the Champion Hurdle before winning the Aintree Hurdle over two and a half miles and defeating Hurricane Fly in the World Series Hurdle.

Jezki is a bay horse with a white star and snip bred in Ireland by Gerard M. McGrath. He is one of the best horses sired by Milan who won the St Leger Stakes and finished second in the Breeders' Cup Turf in 2001. His other progeny include Darlan, who won the Christmas Hurdle in 2012, but was killed in his next race. Jezki' dam La Noire had previously produced Jered, who won the Evening Herald Champion Novice Hurdle in 2008.

During his racing career, Jezki has been owned by J. P. McManus and trained at Moone, County Kildare by Jessica Harrington.

Jezki began his racing career in National Hunt Flat races beginning with an event restricted to four-year-olds at Leopardstown Racecourse on 28 January 2012. Starting at odds of 4/1 he took the lead in the closing stages and won by three quarters of a length from Ned Buntine. He followed up at the same course on 4 March, beating The Big Easy by two lengths and was then sent to England to contest the Grade I Champion Bumper at the Cheltenham Festival ten days later. Ridden by Robbie Power he started at 12/1 and finished eighth of the twenty runner behind Champagne Fever.

In the 2012/2013 season Jezki was mainly campaigned in novice hurdle races. He prepared for the National Hunt season by finishing fifth in a flat race at Navan Racecourse on 10 October. Ridden for the first time by Barry Geraghty, he made his debut over obstacles at Naas Racecourse on 29 October and prevailed by three quarters of a length from the odds-on favourite Ally Cascade. Twelve days later at the same course he won the Grade III Fishery Lane Hurdle, beating seven opponents at odds of 13/8. The gelding was then moved up in class for the Grade I Royal Bond Novice Hurdle at Fairyhouse in December in which he was matched against Champagne Fever for the second time. He was retrained by Geraghty in the early stages before overtaking Champagne Fever at the last hurdle and winning by one and a half lengths. At the end of the month, Jezki, ridden by Robbie Power, started 11/8 favourite for the Grade I Future Champion Novice Hurdle at Punchestown Racecourse and won easily by six lengths from the Dermot Weld-trained Waaheb.

Jezki made his second appearance at the Cheltenham Festival in March 2013 when he started 5/1 second favourite for the Supreme Novices' Hurdle. He appeared to be making progress when he made a mistake at the last hurdle and finished third behind Champagne Fever and My Tent Or Yours. Jezki and Champagne Fever met for the fourth time in the Herald Champion Novice Hurdle at the Punchestown Festival on 23 April. Starting the 2/1 second favourite he overtook his main rival early in the straight and went clear of the field approaching the last, winning by sixteen lengths from Ted Veale, with Champagne Fever in third place.

A. P. McCoy took over as Jezki's regular jockey for the 2013/2014 season. The gelding began his third season in the WKD Hurdle, a Grade II handicap race at Down Royal and won "comfortably" under top weight of 164 pounds. Jezki was then stepped up in distance for the Grade I Hatton's Grace Hurdle over two and a half miles at Fairyhouse on 1 December. Starting the 4/6 favourite, he took the lead after the second to last hurdle and won by one and three quarter lengths from the Willie Mullins-trained Zaidpour. On 29 December, Jezki was matched against the reigning Champion Hurdler Hurricane Fly and the Triumph Hurdle winner Our Conor in the Ryanair Hurdle over two miles at Leopardstown. He finished second of the five runners, two and a half lengths behind Hurricane Fly. In the Irish Champion Hurdle over the same course and distance, he finished last of the four runners behind Hurricane Fly, Our Conor and Captain Cee Bee.

In the Champion Hurdle at Cheltenham, Jezki was ridden by Geraghty as McCoy had opted to ride the Nicky Henderson-trained My Tent Or Yours who was also owned by J P McManus. Wearing a hood for the first time he started the 9/1 fifth choice in the betting behind Hurricane Fly, My Tent Or Yours The New One and Our Conor. All nine of the runners were previous Grade I winners. Geraghty tracked the leaders before sending Jezki up to take the lead from the pacemaker Captain Cee Bee at the second last. He first repelled a challenge from Hurricane Fly and then held off the late run of My Tent Or Yours to claim the championship by a neck. The New One finished strongly to take third, two and a half lengths further back. Only Hurricane Fly and the outsider Steps To Freedom appeared to oppose Jezki when he started 4/5 favourite for the Racing Post Champion Hurdle at Punchestown on 2 May. Ridden by McCoy, he took the lead from the start and held off a challenge from Hurricane Fly at the last hurdle to win by three and three-quarter lengths.