Quote Originally Posted by ladybugplus View Post
verb- hit hard
verb- have sexual intercourse with

So I think you are all correct!

Here a good sentence for it

While bonking my boyfriend last night I was toking up on a bong and then I bonked my head into his head!
Then there is the version that incorporates the cycling definition

After recovering from a big bonk on the bike, I was bonking my boyfriend while I was toking up on a bong and then I bonked my head into his head![/QUOTE]