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!'

under the pump by BVB1 February 14, 2019

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"

Under The Pump by Lord Of All Things Sasquatch November 9, 2020

pumpa under the rotunda 

Anal sex

Dianne was on her rags so I gave her some pumpa under the rotunda.

pumpa under the rotunda by Zonal K June 24, 2018