Top definition
The act of ejaculating in your partners ass crack, and giving the cheeks an almighty clap together to seal the deal.
"Having a dirty one with the missus and the full time celebrations may have got out of hand when I went and gave her the butt weld."
by Only gone and done it May 31, 2016
Get the mug
Get a Butt weld mug for your grandma Rihanna.