Aubrey Victor "Dit" Clapper (February 9, 1907 – January 20, 1978) was a Canadian professional ice hockey player. Clapper played his entire professional career for the Boston Bruins of the National Hockey League (NHL). He was inducted into the Hall of Fame in 1947, the first Honoured Member to be living at the time of his induction.

Clapper was the first NHL player to play 20 seasons, one of only two to be an All-Star at both forward and defence, and the first non-goaltender to play at the age of 40. The right wing on the powerful "Dynamite Line"—one of the first forward combinations to receive a nickname in hockey history—along with linemates Cooney Weiland and Dutch Gainor, he contributed to the breaking of several scoring records in the 1930s. Towards the end of his career, he was named player-coach of the Bruins, and held the coaching position after his retirement as a player.

Aubrey Clapper was the son of Bill Clapper, a lacrosse player and factory labourer. He was raised in Hastings, Ontario after relocated several years to Aurora, Ontario (1915–1920) and Oshawa, Ontario (1920–1923). Clapper was given his nickname at an early age when he would lisp his name, the result coming out "Dit."

Clapper was related to Ed Broadbent, whose grandmother was cousins with father Bill. Clapper started his hockey career at age 13, playing minor hockey in Oshawa, and going on to play with the junior league Toronto Parkdale club of the Ontario Hockey Association in 1925, scoring a goal in the team's Memorial Cup run that season. The following season he turned professional, playing for the Boston Tigers of the Canadian-American Hockey League.

The Boston Bruins bought Clapper's contract from the Tigers in 1927. Hitherto a defenceman, Bruins' coach Art Ross decided to try Clapper at right wing, and the experiment stuck. He scored his first NHL goal—ten seconds into his first shift—in the season opener against the Chicago Black Hawks.

The following season, Ross teamed Clapper up with Cooney Weiland and Dutch Gainor to form the renowned Dynamite Line, one of the first named forward lines in history. The Bruins won the American Division that season and went on to their first Stanley Cup championship, with Clapper scoring the winning goal in the first game of their best-of-three series with the New York Rangers.

In the 1930 season, the league considerably liberalized the passing rules, effectively eliminating offsides. The Stanley Cup champion Bruins took especial advantage, breaking many scoring records and recording the highest winning percentage the league would ever see, unsurpassed as of 2024. Leading the charge was the Dynamite Line, as Weiland led the league in scoring, Clapper finishing third and Gainor finishing ninth; Clapper's goal total of 41 was the third most in league history at that time, he finished the season with a career best 61 points. The Dynamite Line scored 102 of the Bruins' league record 179 goals, as many as last-place Pittsburgh managed. While Clapper scored four goals in six playoff games, the Bruins were shocked in the Stanley Cup finals by the Montreal Canadiens in their best-of-three series.

Clapper married Lorraine Pratt of Vancouver in April 1931.