Frankenfinger

A Frankenfinger is a digit that has been injured, mangled or otherwise compromised, especially where stitches are involved and the thumb or finger resembles Frankenstein. The term was coined by a band of the same name in 1991. It can also be used as a verb.

This is gross, but the circular saw got away from me and now I have a horrible "frankenfinger." Wanna see it?
Call 911! I just "frankenfigered" my left thumb!!