Slip Slap 

Slip Slap is a artist Collective of Renaissance men seeking to translate art into enterprise; talk into action; ideas into reality.

Slip Slap operate on a shared belief that man is limitless in his capacity for development and “can do all things if he but wills them”.

To that end, Slip Slap employ proficiencies in the arts
toward acquiring a universal learning, as well as developing a discipline into a lifestyle, in order to contribute to a world of endless possibilities. The Collective finds myriad ways to express opinions on everything from art to politics to, simply, life.

Our ways of working is through a collective skill set involving painting, sculpture and photography; film-making, theater performance and writing.

Slip Slap is a artist Collective base in Chelsea, NYC

Slip Slap by Slip Slap Chelsea April 22, 2011

slip it in

When you're spooning on the couch and you slip it in from behind

We were just chilling on the couch and I slip it in real quick

slip it in by Bakmon November 13, 2016

slipshod 

poor work, half-assed effort.

The plumber's slipshod repair fell apart within a day.

slipshod by Laura December 25, 2004

Canadian Slapshot

A male takes his penis and dips it in maple syrup. He then approaches a female, who gets down on her knees. The man then winds up, and slaps her in the face with his maple glazed boner.

Aww man her face was so sticky and bruised after that canadian slapshot last night, lol.

Canadian Slapshot by WELL IN THAT CASE, SNARF SNARF January 11, 2011

Ships passing in the night 

A sexual act involving two consenting adults that advances masturbation to the pinnacle of possible techniques.

In order to perform this act, each participant must sit on their non-dominant hand until normal sensation subsides and then commence to pleasure the genitals of the other participant.

Correct execution of this artful technique delivers the sensation of being twiddled by somebody else, by somebody else, by somebody else and by somebody else.

Scott Morrison: Wow Barnaby, I've never felt so close to another man in my entire life!
Barnaby Joyce: See ScoMo, I told you that the best way to align our policies was by trying out Ships passing in the night!

Ships passing in the night by Ultimate Arsehole December 20, 2018

sack slip

When a testicle (more often than not, the skin covering the testicle) slips out of an article of clothing, partially or fully, and is noticed by someone else.

When he was being interviewed by Mo his shorts were too loose and when he crossed his legs everyone to their horror witnessed the sack slip.

sack slip by MortyConti July 8, 2011

slip out 

when a guy is having sex with a girl, doggy style and his penis slips out upon trying to be thrust in.

I was banging this chick real fast doggy style and i kept getting the slip out.

slip out by nicky v. July 14, 2006