1 definition by Big Sammy Fish Head

Pretty self explanatory. When something sucks or blows or is just dumb. Can be used as a play on words.
Example 1:
Arianna: You're an asshole.
Robbie: What?
Arianna: You're an asshole.
Robbie: What?
Arianna: You're an asshole.
Robbie: O i couldn't here you on account of Dick in Mouth .

Examlpe 2:

Teacher: Today we are going to talk about our feelings.
Student: That's so Dick in Mouth .

Example 3:
Fred: When i was little, i fell down the steps and knocked out all my teeth and that's why i talk with a lisp.
Brianna: O thats def D.I.M.
by Big Sammy Fish Head May 16, 2008
Get the Dick in Mouth mug.