1.) Doing something that requires more work than one can handle, i.e. "bustin' ass"

2.) When one sits on a sharp or pointy object and gets their ass injured
That was a real assbuster
by WhoCares22 April 2, 2011
Get the Assbuster mug.
Your in a bathroom stall, but instead of shitting in the toilet you shit on the floor, ceiling, and walls, and end up puking in the toilet but missing.
Pretty much, you get your shit all over the fucking place. And not the fucking place it should be.
Steve was assbusting yesterday. That shit was everywhere, yo!
by MayzieAndTayzie October 24, 2010
Get the Assbusting mug.
A word used in a yelling argument by a Major to publicly demolish someone.
WHAT IN GODS MOTHERFUKING DEVILS COURT GOD DAMN NAME DO YOU FUKING THINK YOURE DOING, SERGEANT? I DONT GIVE A DAMN WHAT YOURE DOING, ASSBUSTER. GO BUST YOUR ASS SOMEWHERE ELSE
by VibingVice January 7, 2021
Get the ASSBUSTER mug.