slijpen 

taking (extra) MDMA when you are on XTC

Kwartje is uitgewerkt, misschien dat ik zo nog wat ga slijpen

slijpen by Tango282 March 23, 2022

slippendale 

When the feeling of being drunk or on a wave makes you crave/ need a zoot

Louise: where you been?
Tim: just got back from pub, feeling pretty slippendale

slippendale by Sophia69pinktaco May 26, 2019

slipendictomy

This is a pseudo-medical procedure in which a male vertebrate from the phylum chordata inserts his phallus into a complimentary female's vagina.

Dude, I had to perform a slipendictomy on this girl today, she was alright.

slipendictomy by Weiping February 12, 2007

slippen 

The act of not acting right -- One who is not living up to par. Forgetful in doing what you're supposed to be doing.

Hey don't let the boss catch you slippen.

OR

I can't believe you forgot to pay the rent -- Man you're slippen!

slippen by Chula July 18, 2006

Slipendictomy

To stealthily insert one's member into one's partner's orifice, typically occurring in the morning.

I woke up with a raging boner and only 20 minutes to get ready for work. Foreplay would take too long and waking my partner would be bothersome. If I was to deswell my throbbing member, it was critical that I perform the slipendictomy quickly.

Slipendictomy by Meatymuff January 27, 2016

Slimpenis 

Parody of the name of rapper Slim Shady (Marshall Mathers) used by people who think he is simply a fake ass white boy.

''Hi my name is, Slimpenis''

Slimpenis by Brendan April 5, 2003

slippen sie

General statement used by english "praktikants" in germany.

As far as we know, it means nothing in german. German women have no idea. :)
Used as a statement of affection/admiration/shock

chimp1 is sleeping on the sofa after 3 hours sleep.
chimp2 walks in and decides to wake him up.

"SLIPPEN SIE"

slippen sie by chimp1 July 11, 2004