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1.
A friendly male bonding gesture in which a man thrusts his penis into another man's anus. Similar to brofist, only more meaningful and significant, usually reserved for occasions where a man has done something especially great or awesome enough to warrant a bropump.
Dave: Hey bro, I was at Best Buy today and got you a copy of Battlefield: Bad Company 3 so that you and I can play together. I know money is tight for you right now, but hopefully this will bring you some enjoyment.

Steve: Holy shit, bro!! You serious?! Thanks a lot, that's awesome!! Brofist! No... wait... this calls for something greater. Get over here and unzip your pants real quick!

Dave: Um, what?

Steve: Bropump, man, bropump!! Hell yeah! Hurry up, while I'm still hard.

Dave: Uh, Steve, doesn't that seem kinda gay to you?

Steve: Nah bro nah, not gay at all, just showing you some appreciation. I'm straight, you're straight. I've done this plenty of times with my other bros.
by PrawnGuy July 25, 2011