Use of methamphetamine/speed (T is slang for meth/speed). No speedbumps when t'd up=nothing to slow one down (bonus). Turnt/Turnt up is a synonym (the T once again referring to meth/speed).
I'm T'd up.
by DCRabbit June 2, 2018
A person who has a muffin top, kankles, thunder thighs, neck fat, back boobs or is by any other definition: FAT!
Dude 1: Dude, check out that girl over there. Her fat rolls have fat rolls.
Dude 2: Totally Dude! That Girl is T'd up from the feet up!
Dude 1: Totally!
Dude 2: Totally Dude! That Girl is T'd up from the feet up!
Dude 1: Totally!
by Brinumbatwo December 29, 2011