Used to describe an easy, ugly, fat chick you took home and slept with after one too many drinks. You will never call her back and pray that a condom was used.
Thanks for letting me crash your pad last night I owe you. I also owe you a new towel... Lil' Big Mistake made me clean up after myself.
by abramm24 March 25, 2009
Get the Lil' Big Mistakemug.