Exposing your bare ass and spreading your butt cheeks onto an object possibly leaving a slight anal residue to the surface.
"Bro, I was Pressing Ham on my neighbors door handle last night and my best buddy opened the door right after"
by Johny Cakes February 24, 2012
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When two dudes greet eachother, in a non-gay way, by lifting their shirts and pressing their bare fat guys together.
Two dudes: "Hey dude how's it going?" * They Press ham

Dude over there: "wtf was that!?"

Two dudes together: "it's pressing ham man! Best way to greet someone!"
by Drop-it April 01, 2017
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