Definition of my ass!
chiefly US, informal + impolite
: what nonsense Work, my ass! You just sit in front of the TV all day.
Word by Word Definitions
: of or relating to me or myself especially as possessor, agent, object of an action, or familiar person
: million years
: used as a postpositive intensive especially with words of derogatory implication
Seen and Heard
What made you want to look up my ass!? Please tell us where you read or heard it (including the quote, if possible).