look up any word, like ratchet:
 
1.
When someone has a crush on a guy's penis. The person most likely only likes the guy because of his penis size or what he can do in the bedroom. Although, a penis crush can turn into something more.
I have a major penis crush on Brett.

I dont really like Tom, I just have a penis crush on him.
by simmadana February 11, 2011
 
2.
The willingness to commit to one male based on the fact that you know his member would please you till death do you part
I had such a huge penis crush on that Belgian dude. I would've married his horse cock in a heartbeat.
by Dixlvr27 August 31, 2013