Top definition
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.
by D audi February 05, 2012
Get the Base-Up neck gaiter and mug.
Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

Susan: 'LEAVE BRITNEY ALONE!'
by Billy Chickenhole September 15, 2007
Get the Leave Britney Alone neck gaiter and mug.
2
To burn marijuana with one or more people.
Jeff: Hey Billy you work today?
Billy: Nah man.
Jeff: You tryna base up?
Billy: Yee bub.
by Base Up Lord May 12, 2016
Get the Base Up neck gaiter and mug.
3
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?"
by Power Wine January 01, 2012
Get a Base Up mug for your dog Helena.