This means leaving a very generous tip (usually 50-100%) when out drinking and/or dining. Especially when out with a large group of friends.
I'm going to FAT-TIP the bartender so that we will be remembered and taken care of for the rest of the night.
by Pmdmnym July 13, 2015

by babycakes23 July 4, 2009

A condition caused by errant pubic hairs, caught in a mans underpants, becoming stuck to the tip of his penis.
Bee: "So, did you go down on him?"
Charl: "Well, almost. But when he dropped his draws, I noticed he had major felt-tip. I was out of there in seconds!"
Charl: "Well, almost. But when he dropped his draws, I noticed he had major felt-tip. I was out of there in seconds!"
by Paul William Kemp September 7, 2009

When a cyclist stops at a junction or red light and tries to keep balance without placing feet on ground. Very similar to cow tipping, window down and push.
“Dude, You see him trying to keep balance on peddles........roll down window.......fucking CYCLIST TIPPING is AWESOME!!!! Stupid peddle wanker!!”
by Iwannariot March 14, 2019

When the tip of the phallus protrudes through a article of clothing worn in the leg region; When the tip of the penis sticks out of the band of male underwear when they have an erection. Popular examples coined by Daniel Avidan from the popular Youtube channel Game Grumps.
Part 4 of the Bloodborn Walkthrough on Game Grumps (Death Barf) Danny- "My friends and I created a new um, a new ah, term for when you get a boner; but like the top of it comes out of the waistband of your underwear. It's a Tip Slip. (Arin laughs hysterically afterwards)
"Hey man, John just gave a major tip slip in Gym today!"
"Hey man, John just gave a major tip slip in Gym today!"
by Pseudonym of Handles April 8, 2015

by Ryan Freel July 24, 2006

by dezzzz August 25, 2005
