coining (verb)

putting a coin in your penile-hole to enhance your cumflow and get a more immense cumshot. Works like a buttplug in the penile.
slang definition: using a coin like a cork under your foreskin, that builds up pressure in your penile-hole sendingthe coin flying at an enourmous speed

hey dude, did you remember to coin yesterday? i could use a mammoth cumshot.
dear teacher, i cant attend class due to late night coining (verb)
"I can't coin"