A sex act involving a man and partner, in which the man, with expert precision, ejaculates between their partner's ass cheeks and presses them shut, allowing the semen to dry. The dry semen forms cement, welding the cheeks shut.
"Man, that bitch Randy was such an ass until I gave him a vertical butt weld. His dumbass won't ever shit or call me gay again."
by Vertical Butt Weld Man December 07, 2019

When you run out of glue sticks for your hot glue gun so you melt tiny scraps of dry glue as a substitute.
I ran out of glue sticks when I was making my science project, so I had to glue weld the planets to the sticks. It took forever.
by boi_in_a_band December 13, 2018

by Milfy dearest April 13, 2021

When two women grind on each others clits so hard it creates enough friction heat to be uncomfortable.
by ppglazer67 August 13, 2025

To pulls ones butt cheek apart from the other in order to tighten the poo lasso achieving a fart sounding of a welder and avoiding old man baritone bum.
by Grumpyolturd May 03, 2019

When two men touch their dicks together with cum on them and the cum dries gluing the dicks together.
by TheRealistDealist December 13, 2020

Refers to metal-fabrication dat you are able to perform with just your own fart-gases due to their being so super-hot dat you can actually use them like a welding-torch.
I made da mistake of sitting on a stack of several nested chairs while chowing down on extra-spicy baked beans, cabbage stew, and hot wings at my buddy's backyard barbeque, and after some uproarious whizzpopping adventures, I ended up butt-welding da chairs together into one solid mass of metal tubing!
by QuacksO February 06, 2021
