Brothers who have the same father, but different mothers. Can also be used loosely even if people are genetically unrelated, similar to "brother from another mother" but without sounding like a moron.
What's up my brother from another mother?

Dude you're white and from Mission Viejo, CA. You sound like a moron. Call me your Nut Brother instead.
by Bee-rant September 17, 2010
Get the Nut Brother mug.
Squirrel for: Taking up arms (i.e. getting ready to battle).

First coined in the Sears Commercial 'Squirrel Revolt'.
(Man walks in with wife to display a bunch of squirrels cutting coupons for them)
(Head Squirrel flips table)

Squirrel: We're tired of you humans and your tyranny! Nut Up my Brothers!

(Squirrels proceed to attack the humans and vandalize their property)
by My pseudonym is already in use October 24, 2013
Get the Nut up my brothers mug.