slang A colloquial variant of "your mother," used as a general insult, especially in response to a criticism or offense from someone else. A: "You really ought to lay off those donuts, don't you think?" B: "Yo momma!" Boom, slam dunk, baby! Yo momma!
See also: yo
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.