Top definition
When a person typically of a jolly disposition becomes exceptionally grumpy, stubborn, and generally adverse to having any kind of fun. This condition can usually be overcome with an adequate supply of caffeine.
Adam is being extremely grumpy and doesn't want to do anything fun, what a Badadam.

He is very tired and he's just turned Badadam, so we can't convince him to do anything.

One second he was in a fine mood and then he transformed into Badadam and got all poopy.
by Iwantsomecafe March 14, 2011
Get the mug
Get a badadam mug for your father-in-law Bob.