Idioms and Phrases with beat the meat
beat the meat
Masturbate, as in He was always beating the meat. This term, considered vulgar slang, is used for males, since it uses meat in the sense of “penis,” a usage dating from the late 1500s.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.