Top definition
Acronym: Snickering In The Back Of My Mind.

!.) Typically used in text and/or chat when one finds something amusing but does not actually laugh out loud

2.) Can be used to inform a friend that their joke was short of funny, or even not funny at all.
Ralph: Did you hear the one about the sidewalk?

Sam: Um... no I guess not.

Ralph: Its all over town.

Sam (with blank expression): Sitbomm
by Big Mean Pappa Bear June 08, 2013
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug