When someone does something weird or unexpected that is either slightly cruel or kinda cool but still weird. Can also be said if you want to say something that rolls off the tongue.
Person 1: Hey howd you do on that pop quiz?
Person 2: Man, terrible. That was kinda freaky deaky dontcha think?
Person 1: Yeah, it definitely was.
Person 1: Do you see that face she made? That was weird.
Person 2: Haha I thought it was freaky deaky personally.
To be in a heightened state of sexual arousal and performing strange, extreme, or unusual sexual acts.
"You hear the bass? Right? It kicks. It turns. It curls up your belly. Makes you wanna freaky deaky"
Buck Swopes in Boogie Nights
The "Big Dog" robot with four legs that carries supplies like a mule is freaky deaky.
Someone who is excited by the act of performing extreme sexual acts, see: s&m
Carla and I got freaky deaky last night with whips and leather.
another word for being good in bed.
stacey was freakydeaky last night under them sheets.
likes to get down and dirty
sherry wang is the quintessential example of freaky-deaky-ness