Under The Pump

Under the pump - for being very busy, feeling the pressure (like that caused when using a pump to inflate), almost at bursting point.

How are ya, mate?

'Far out mate, been under the pump!'

By Malory

Under The Pump

When you masturbate then do a backflip as you climax so that you ejaculate on your own face in mid-air.

Person 1: "Is that a bit of ranch dressing on your face?"
Person 2: "Nah, I've just been under the pump"

By Cilka

Define Under The Pump Meaning