A pseudonym for fuck, shortened from the vulgar term fist fuck which involved the insertion of a whole arm into a bodily orifice, an attempt to bring this term into mainstream usage was made by Australian Radio and Television personality Maynard F# Crabbes who often used this term back in the days when the censors in Australia still did not allow such language to be broadcast, In one extremely funny incident memorable to the submitter when hosting a childrens Word puzzle television programme Maynard declared the next letter to be "an F, F FOR FIST!" While this obviously vulgar reference passed over both the childrens and censors heads, the more mature viewers who had tuned in to see the great man were besides themselves, (those who got it anyway!)
Geoff: That Barbara is one hot mama!, man do you think I stand a chance of getting a fist?
Allan: I don't think so my friend, she is a bit more fistable than you.
Tony: I just lost my wallet!
Geoff: Oh fist me dead mate! how the bloody hell did you go an do that?