pump jacking 

When you got to poop and its jumping in and out of your butthole

Man I gotta poop, it's pump jacking bad

pump jacking by Jack deznuts October 22, 2019

pumpjacking 

Pumpjacking : when a drunk friend is sitting on the couch nodding their head from upright to hanging down trying to stay awake

Meandeanbean: Hahaha look at Billy over there pumpjacking , get the sharpies ready

pumpjacking by MeanDeanBean April 12, 2015