To fall down or crash whilst on bicycles, scooters, scateboards, etc.

Australian colloq.
hey mate, did you see that guy who fully stacked it on his bike the other day?
by iamewy January 31, 2009
Yo, I only gotta stack to play wit for the weekend.
by Brath November 7, 2004
Often used to describe a woman with large bountiful breasts. More commonly used to describe a woman who not only has large appealing breasts, but also has a beautiful face, bodacious hips, and an amazing ass.
Eh yo Chris, see that girl on near the bench press? She is fucking stacked! Damn Kevin, she is stacked.
by FoxMulder69 October 19, 2018
one stack = 1 G
by Anonymous July 14, 2003
You say this when you’re being deadass, but more than deadass. Like someone is being held at gunpoint.
Guy 1: i don’t like you that much
Guy 2: deadass?
Guy 1: no...
Guy 2: haha good joke ma—
Guy 1: on a stack
*Guy 1 murders Guy 2 and effectively reduces his life to nothing but shambles*
by cracked :) March 12, 2021