Short for SteamPunk-As-Fuck; from the punk rock term "punk as fuck". To go out dressed in full Anachronistic Victorian-era clothing, with gears, brass and leather.
A derogatory term for either a well used vagina or the open mouth of a drunk lady, which you can use to catch your volitile ejaculate.
'yo dude look at thatdrunk bitch, she is well up for being a spaf catcher.' or 'Hey George, let us venture to Amsterdam and procure ourselves a filthy spaf catcher.'