look up any word, like hipster:
 
2.
Feeling nervous, exited, stressed.
Mood test form question: Have you felt keyed up or on edge?
Applicant: (yes)
by lubhzagain August 25, 2011
 
1.
really high on cocaine
(presumably because you've been using car *key* to bump cocaine in some bathroom)
one more bump before we go?
naw, i'm all keyed up, let's roll.
by situsitu November 29, 2011
 
3.
ready to go, bubbling over
I'm so keyed up for TRE2K6!!
by Small Feet December 15, 2006
 
4.
To be extreamly pissed off.
To be extreamly upset.
...both!
Kiara is extreamly Key'ed up.
by RaCailum January 24, 2006