look up any word, like bukkake:
To masturbate very very hard and for a long time.
Could also mean to fuck somebody very very hard.
Your choice really.
n00b: duuude that girl makes me bonehard!!1
person: omfgzzz!!1! shes BUFFTINGZ rofl
by Beka Bonehard March 15, 2007

Words related to bonehard

fuck masturbate sex tommy tank toss wank