fashigganot 

the oppostie of for sure. definitely not.

If a guy asks a girl to pay for his meal, she can say "fashigganot".

fashigganot by Nedra "Ms Trouble" June 19, 2008

fashiggadow 

over exaggerated excitement, agreement or response

Tim: these ladies want to sit on your face

Bob: Fashiggadow

Zach: hey dude i rammed that chicks ass so hard she farted out jizz

Sean: Fashiggadow, that's how real G's does it

fashiggadow by VehicularMayonnaise June 18, 2010