Like a piss up however a much nicer word. Normally involving drinking lots of beer.
"Do you want to come out for a brew up on friday night?"
by brewer123 August 3, 2009
Get the brew up mug.
From world war two and used, usually by British soldiers, to describe the effect seen when the amunition propellant in a destroyed tank starts to ignite. The flames shoot out of any opening, most usually the turret hatches, extremely violently, like a Roman candle. This terrified tankers and as a sort of black humour they referred to it as brewing up.

Other nationalities sometimes referred to it as cooking off .. the ammunition was cooking off.
The tank was hit with an AP round and within seconds began to brew up.
by Something no one else is using February 21, 2019
Get the Brew up mug.
An irresistable urge in your bowls causing you to run to the shitter after drinking a hot cup of java at work.
After his second cup of java Skippy was all brewed up and raced to the bathroom just in time for his first bowel movement of the day.
by LTPA September 1, 2009
Get the Brewed Up mug.
1) Brew - Substitute for any verb
2) It - Substitute for any noun
3) Up - substitute for any verb
"I am going to brew it up!"
by Peter Nelson February 7, 2004
Get the brew it up mug.
To make a pot of tea. Usually used in the context of plural .. a pot of tea of several cups, rather than single cup, when you would instead say, "making a brew"
I'm just going to brew up. Fancy one?
by Something no one else is using February 21, 2019
Get the Brew up mug.
Make me a cup of tea

N.B

Not to be confused with

2. "Got one BREWING up"
A warning that your mate is Gonna Fart in a minute!
1. Brew up then will you I'm spitting feathers here!

2. If I were you I would go in other room..

Got one BREWING up and it's gonna be rancid mate
by SKULLION 💀 April 17, 2022
Get the Brew Up Then mug.