When everyone jumps on top of one unfortunate soul, they 'pile on'.
The much less wimpy sounding version of bundle.
'Look, Chris is asleep. Pile on!'
by Kurt H October 18, 2005
Pile On - "sexual definition" - to have more than 2 people join together on a bed, rug, or elsewhere for the purpose of engaging in group sex or group sexual intercourse.

Usually associated with group sex, swinging, swingers, the lifestyle and other free-thinkers.
Linda and Jim were fucking naked on the bed. Debbie got undressed and joined them. Then John walked in, got naked and asked if he could pile on. They all shagged and reshagged for hours. The swingers piled on each other all night.
by Juke Boxx Hero October 23, 2011
That guy who is an awkward addition to any conversation, plan etc.
"Why was Joshua with us at dinner the other day?"
"I know right? He invited himself to our plans at the last moment."
"How awkward, especially after what he said to Kate last week! Such a pile on!"
by Penkash November 15, 2016
When you have to take an emergency poop, but all the toilets are already clogged and you go anyway.
I stopped at a rest stop on the interstate and the toilets were full of poo, so I got stuck piling it on.
by Jake2z June 5, 2011
anything that is a piece of shit, somthing that crappy,old or broken..
Dude your car is a pile. (meaning your car is a piece of shit)Can even mean a person who is lazy or just a waste of life)
by jon February 20, 2005
. Sitting on a radiator or dildo for long periods of time, causes this itchy medical complaint. "I would purchase one of the many effective pile creams, for soothing relief. But i'm quite thrilled by the burning sensation similar to that of a hot fish finger shoved up my arse" chuckled Julien
by James November 11, 2003
To sit on the couch in semi darkness for hours on end, ordering food, consuming various and sundry pills, avioding all cell phone calls, while being in a state of semi dress and watching massive amounts of TV (if one can retain consiousness).
Bob hasn't come out of his apartment in two days, what a pile.
by Dan Reeves January 10, 2006