The act of tripling an opponents score in fantasy football, so as to metaphoricallywipe your ass with their pride and render their team irrelevant in your fantasy league.
"Dude, did you lay a Partaining on him last weekend?" -Guy 1
"Yeah I Partained him hard, 152 to 49." -Guy 2
"That's crazy, he's so terrible." -Guy 1
"...I also had intercourse with his mother." -Guy 2
To gain sexual gratification from rubbing and filming pertis machines, extreme cases sometimes lead to insertion of the male genitalia in the coin slot and rubbing whilst jotting down train head codes, eating a tuna sandwich and making choo choose noises at the point of climax
Sam was out pertising for so long lastnight that his wife had a go at him