Shank you

By saying Shank you, Exa is warning Eric that her “brothers” would stab him with a shank.

Shank is a slang term for any sharp or pointed implement used as a knife-like weapon. In common usage, the word is frequently used when referring to an improvised bladed weapon. Shanks are commonly made by criminals across the Union. A shank can be anything from a glass shard with fabric wrapped around one end to form a handle, to a sharp metal blade stuck in the end of a handle.

Synonyms include chiv, and chib, along with "shiv", These terms can be used to refer to the weapon or the act of attacking with such a weapon respectively.