mana-boner 

When too dudes or dudettes turn a conversation into a Magic the Gathering conversation, sometimes to the dismay of friends, it means they had a mana-boner, and could not contain their excitement about an aspect of Magic the Gathering. For context, mana is the in-game currency for Magic the Gathering.

I'll leave you two mages alone to rub your raging mana-boners together and make a mana-fire.

mana-boner by xxmtg June 13, 2022

Manboner 

When a man has a hypothetical boner for another man. i.e. mancrush. This does not mean that the man is actually sexually attracted to men, just that if he were attracted to one, a certain man would be it.

Dude: I'm can't chill, I'm going to the gym with Alex.
Chick: I figured, you've got a total manboner for him.
Dude: Shut up.

Manboner by MC Shopping Cart October 14, 2011