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1.
To be Upside down is to have an alcohol hang over, that also includes weed hangover. This happens when the night before you have been drinking and smoking Marijuana a lot. The feeling includes headache, stomachache, bad taste, dry through, weird thoughts, accessional sleepiness, and with that weird dreams.
"Im an jsut so upsidedown today, i barley got anysleep last ngiht formt he party"
by Dieweak73 May 12, 2008
17 4
 
2.
Another way to say "Behind you" with more enthusiasm.
THE Car! THE CAR!! QUICK! UP-SIDE DOWN!
by Rusty May 15, 2004
1 2
 
3.
to owe more then you have
"I'm upside down on my car loan." "I know I owe you money but I'm kinda upside down right now."
by Cre8aDeb8 September 07, 2008
10 13
 
4.
The best way to use things, acording to legends of the cool_dez, who was proven not to be the most coolest.
Works best with the X-BOX on halo, with the controller upside-down in your hand.
by FaTaL-XP October 08, 2004
3 16