An extreme irrection in which the male obtainee is unable to hide, control, or releive the built up sexual tension in his penis.
Dude, I had another bonerism in Algebra today when Kelly bent over to pick up her pencil.
by Jameson February 7, 2005
a reply to just about any statement for humor or to loosen up an intense situation.
1.bob: I drunk coffee this morning

chuck: with a boner

2.tanner: I swear I am about to punch you in the face

random guy in the background: with a boner

tanner: (chuckles)...never mind
by the trevmeister November 15, 2011
It is the man's obligation to put his boneration in a women's separation. This sort of penetration will increase the population of the younger generation.
by Cody (wdw_) December 19, 2003
when a guy sees something he finds sexually stimulating and makes his penis become hard and he wants to fuck whatever it is
Jack: Yo you got a boner dude!

John: I know. That watermelon over there is pretty sexy
Jack: ...
by Marley :) June 24, 2017
*3 very sexy girls in one room*
Mark:My boner is telling me that all of them are a good choice.
by Jon200105 February 25, 2013