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To 'Base Up' refers to one of three things.

1. The application of hand sanitizer (from the base to the tip, hence the name) to ones genitals before or after a particularly questionable bout of intercourse (though a post-coital 'base up' is less likely to result in unwelcome friction).

2. In reference to the sexual encounter itself, whereby you engage in risky business and will likely require the application of 'Base Up' in the near future.

3. As a noun referring to the sanitiser itself.
"I didn't use a condom, better base up"
"Should we base up before going to the clubs?"
"Who used all the base up?"
Base Up by Power Wine January 2, 2012
When two bros are stationed at separate military bases, but are attempting to get stationed together.
Dude, when we base-up we'll get into all sorts of shit together.

I'm telling you, we're gonna rip it up as a wingman duo.
Base-Up by D audi March 12, 2012

base me up 

When a girl can/should get to the base of ones cock
base me up by Fizzle87 September 19, 2016

Fucked up the base 

When a person or situation, automatically or on purpose blocks the graft a man has put on a female to get sex. Very much like a cockblock
My flat mate won't leave the house now he's.....Fucked up the base

Stealthie 

when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.

This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"

FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"
Stealthie by gwenhyfar October 2, 2016
Word of the Day on May 25, 2026

Summer Teeth 

When someone has a lot of missing teeth.
Mannn, that dude has summer teeth!
What do you mean?
Summer here, summer there...
Summer Teeth by BeckPot August 2, 2012
Word of the Day on May 24, 2026