When a man gets an erection because he is either thinking about or currently enjoying multiple manly things at once.
Manly things may include, but are not limited to: beer, boxing, hot wings, UFC, jack daniels, pornographic material, (fantasy) football, full-contact football, meaty subs measured in foot increments, anything flannel, boobs, dip, shit and fart jokes.
Bro 1: I wonder what they'll show tomorrow night at the bar, there's a UFC and boxing PPV at the same time.
Bro 2: Damn. They should play both, then sprinkle porn on a couple TVs, too.
Bro 1: Amazing, then think about all the wings and beer we'll have...maybe pack a lip, too?
Bro 2: I'm getting a manrection just thinking about it.
"Yo, James was mad drunk Saturday, and he threw his arm around me and was like an inch away from my face. Dude was getting a little too manffectionate for my comfort."
1: a force acting mutually between 1 or more men, at least one being very or extremelysexually attractive, tending to draw them together, and resisting their separation; and yet still maintaining a proper heterosexual distance between them
2: The property or characteristic of a sexy man that attracts or is intended to attract other men by appealing to their desires and tastes,