Top definition
The act of sexually penetrating a partner so deeply, forcefully, and continuously, that you physically mash their guts.
Dude did you see that girl? I would totally mash her guts!!

Why yes Oliver, Glen and I had a wonderful time last night. After we were done sword fighting he penetrated my anus and mashed my guts!
by bossytim6969 May 25, 2018
Get the mug
Get a mash her guts mug for your barber Paul.