"gaff the crew"

I think that the verb gaff is probably a backformation from gaffer (cf. babysit, burgle, etc.). That being said, I have often wondered if gaffer in its movie electrician meaning was related to gaff 'the hook' or gaffer in its old man or boss (UK) sense. Some movie industry terminology is quite interesting: e.g., gobo, cookie (or cucaloris), vorkapich (for montage sequence), gaffer tape (not to be confused with duct tape), C47 (aka clothes pin).

Ceci n'est pas un seing.