look up any word, like the eiffel tower:
A way of saying that you shouldn't quit you job if you're really bad at something.
When a (girl/boy)friend does something he/she is really bad at you say "Don't quit your dayjob", so they don't think they can make any money on it.
by Hei124567890 February 12, 2010
An insult; meant to inform someone that they are horrible at what ever they are trying to do, and should not make a career out of it.
Chick 1: My heart will go oooon and oooon!
Chick 2: Don't quit your day job.
by Isultinator November 20, 2003