Philthy Mickelson
Phil Mickelson, the famous golfer, is less well known for being a little bitch who refused to sign an autograph for /u/Checkers10160. He also gave /u/grismas aunt the clap and has become immortalised in this nifty little euphemism.
My aunt was on the receiving end of a Philthy Mickelson. I'm not sure she will recover.