upcupping 

The "art" of ordering a smaller size drink but asking for it in a larger size cup to avoid having to pay the higher price of the larger cup.

Here is a common example of upcupping I see in my days at work.

"I would like to order a 16oz Coffee but in a 20oz cup and fill It to the top with cold milk"(or water or ice)...

Being a "professional barista", (I own a small drive thru espresso stand) I see a lot of upcupping by people trying scam me out of a mere .50 or so.

upcupping by TheCoffeeBrake101 April 17, 2016

uncumping 

when you collect cum in the cups of your hands and slap it across another’s face

i uncumped stacy so hard last night

bro i’ve been uncumping for years

uncumping by captain sandy April 12, 2022

uptipping 

to inquire, request, or demand a sexual rub down post massage

Chong Ke Limp: Will you be uptipping today sir?

Richard: Yes, get on my schlong

uptipping by dtw2 August 22, 2011