When you crap yourself, but not a liquid shit, a nice hard terd.
Oh man, looks like Cliffosaurus is sporting an ass boner!
by Johnstockton October 02, 2009
a boner that you get in you bumbum
man ive got the biggest assboner
by periii December 04, 2010
When you get fucked so hard in the ass you pop a boner.
Dude:i got ass boner so hard, it went to far in now i got a boner!!
by skghruighauihgauigbp April 17, 2009
When something turns you off so much that you get a negative boner which then comes out your ass. Or when something turns you on that should not causing you to get a negative boner which then comes out your ass.
"man, i saw these half naked pictures of harry potter and got an ass boner"
by EWC November 12, 2007