niftykeen 

1) to be considered excellent amongst a field of other choices or examples
2) better than being nifty or being keen.

Your report was so niftykeen I posted it on the bulletin board.

niftykeen by Michael August 19, 2003

Nifteens 

An amount of weed at the price of 15 pound

"yo do you wanna get a tens?"
"nah lets make it a nifteens"
"YEA we gon get high today Nigga!"

Nifteens by Nasty_Bunnerfolyf May 20, 2009