silent hero 

The event where you do something spectacular, but no one is there to see it.

Ahh man did you see that.... No reply, because there's no one there. That was a silent hero moment.

silent hero by squibs December 20, 2016

Silent Ninja 

When a guy is having sex in the doggy-style position and spits in her anus and slowly and silently slides his fingers, usually his thumb or middle finger, into his woman's anus for better stimulus and for his own self-enjoyment of the moment, gently stroking it in and out, with the hopes that she doesn't mind or won't say anything! That's a silent ninja!

On the bad note: It could also be reversed too. A wicked girl can give her boyfriend a silent ninja too! And he might end up liking it!!!!

Last night I gave my girl friend a silent ninja and she didn't mind. I guess she likes it in the ass after all?

Silent Ninja by Attila the Milf Hunter July 30, 2010

silent tweetment 

a process of punishment achieved through a deliberate and conspicuous lack of Twitter messages

She's annoyed with us for not waiting, so she's giving us the silent tweetment.

silent tweetment by Cleopatra1 March 31, 2009

silent scuba diver 

When you silently urinate by submerging your dong into the toilet and pissing with no sounds or splashing.

It was real late and I didn't want to wake the baby, so I had to go silent scuba diver.

silent scuba diver by chughes January 10, 2007

Silent but Violent 

When one is able to fart quietly but still keep the awful aroma circulating.

John: Dude did you you just pull a silent but violent?

Mike: No, but I think it was Emily. She's had a hostory of them.

Silent but Violent by jisherjally September 10, 2013

Silent Revision

Any update to a product that is sold in the same model designation as the previous variation.

Sennheiser made a silent revision to their HD600 headphones

Silent Revision by Hoytmaster February 6, 2020

silent morning 

A morning in which is free of talking from the girl you just boned the night before.
or
a morning where you wake up and find out the girl has left...leaving the room quiet and peaceful

"Man, last night I boned this boom broad and the next morning she smiled at me and then eventually left. No hassles, no strings attached...was the best silent morning I ever had"

silent morning by Don Stefano July 29, 2008