He meant he wanted to end your relationship. That's it.

oh my gosh! this is so freaking hilarious. Why not do it to him next time and see how he responds? If he responds in a humorous manner than that means it was a joke to him. If he gets angry then it probably means you should break up with him...

Your boyfriend just got on my awesome list.

us guys do that to show happiness on the highest of levels

FML FAIL

You're boyfriend's a d-bag. Dump him. He obviously meant for you to kiss his ass.

I wanted to make sure that you get this whole guy-language, also known as idiots' ways of telling you things: 1. If the guy agrees with you, he haven't listened to what you were saying. 2. If the guy doesn't agree with you, then he is just suicidal. 3. If the guy slaps his butt it means that he actually likes you and wants to know stuff about you not just being his little sex-toy, so you should take this as a sign of "love" and marry him right away!

hahahahahahahahahahahaa i dont know why i find that extremely funny

AHAHA!!!!!!!!!!!!!! My boyfriend would do that.

In some cultures, this means he wants to make mad, hot, monkey love to you.