n. — Newfoundland
someone who teases; a bully.
Type: 1. Origin — A cockabaloo is a bully, or someone who is annoying you (see the 1999 quotation). It likely derives from the word cock, which is defined as 'leader, head, chief man, ruling spirit' and linked to 'cock of the school' (see OED-3, s.v. "cock" (7)). The term is described as an "old Newfoundland term" (see the 1999 and 2012 quotations).
See also DNE, s.v. "cockabaloo".