look up any word, like cunt:
 
2.
of or pertaining to the state of being shankable.
Man, did you see my new prison shank I just got in the mail?? It's full on shanktastic!!
by roller03 February 10, 2011
 
1.
Something that is very prison-like, Often a common item that can be made into a prison weapon.
"WOW, that melted pen is SHANKTASTIC!"
by Pyrotastic December 01, 2007