silent but deadly 

perfect description for beno

im sorry i forgot about beno, he sure is silent but deadly

silent but deadly by eZilAhr June 17, 2019

silent but deadly 

Not a spleecher or a barfoom in that the originator of these stinkbombs cannot be detected until it is too late.

Some broccoli-munching vegan cut a silent but deadly stinkbomb on the bus. Eat meat, twerp!

silent but deadly by Cosmicstargoat April 22, 2004

silent but deadly 

A subtle release of nasty botty gas.

I just did a SBD!

silent but deadly by Andrew Briggs January 31, 2004

silent but deadly 

Legend has it that a man named Pierre Chappele, when on a recon mission, he found an enemy that was going to the bathroom.

Pierre snuck up behind him and slit his neck, his last words sounded like a mild fart.

Silent But Deadly is now used as a military term to describe an AWOL (Absence without leave)

silent but deadly by Not Zane July 22, 2004

Silent but deadly asf 

A fart that is silent but it smells very bad.

12345?
54321?
Silent but deadly asf

Silent but deadly asf by SilentPlaysIsGhey June 17, 2019

Silent but deadly fap 

A gap in which you have to silently masterbation while in the same room as someone else without getting caught

Person A "hey what were you up to last night?"
Person B "I was doing the silent but deadly fap challenge, how about you?"

Silent but deadly fap by Wanna date? November 10, 2019