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vulgar slang An extended session of sexual activity.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. serial copulation or sexual activity; an orgy. (Taboo. Usually objectionable.) It was no honeymoon. It was a first-class fuckathon!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.