a comic who supports the leading comedian, often as a straight man, especially in burlesque or vaudeville.
any person who plays a secondary role or serves in a subsidiary capacity.
Compare top banana.
Origin of second banana
First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
see under top banana.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.