Cum muffler 

The wad of toilet you hold against your asshole to muffle the sound of shame as you try to expel the cum from your anus after butt sex so you're roommates can't hear.

I used a cum muffler and my mom didn't suspect a thing

Cum muffler by B&A&F March 17, 2017

cum muffler 

Someone who rapidly dives headfirst into a masturbator's crotch to deflect the emerging cum before it hits the ceiling with an audible splat.

I'm ready to blow any minute...will someone please get me a cum muffler?

cum muffler by crapicarplips April 8, 2003