massivenassif 

adj. when someone is very good at something they do they are called 'massivenassif'

Damn!! Dem dat dere boy jus hit 6 hole ins oneses!! He be massivenassif!

wow, joe just won a 19,000$ pot playing poker. quite massivenassif!

massivenassif by sirPbaggy July 29, 2008