The ability for something to be so awesome you can nut to it. Normally this should be used in context for a possession though it can be used to refer to a hot girl.
Sincere came to school with one sexy ass haircut one day
Squiddy-"Dammmmnnnn Sincere u got one nuttable haircut I might just bust oneright now daddy"
Sincere in his head "Wtf is wrong with squid"