A Pitchman is someone who would try to convince you of a sale, The most authentic type of Pitchman would be located on a street corner or outside a busy area, he would have a small stall, which he would carry around easily with him from place to place trying to sell his wares. Not comparable to modern day charity clipboard people, these guys had an art and a style to how they worked and they would always make a sale, in the short term or long term.
That's Old Ed over there. He sold me this tie for only a buck!! He's a real Pitchman.
A Tic Tac Man or Tic Tac, is a bloke who'd communicate using hand signals about the odds of a race, usually horse races. He would wear white gloves to make his hands stand out. Unfortunately, with the use of modern day technology such as mobile phones and the internet, this profession has sadly disappeared almost completely, if not already.
Hell, that baseball coach is giving signals like a bloody Tic Tac Man, I wonder how he keeps track.
Sometimes spelt 'Phlim Phlam', a bloke who tries to swindle you, to take advantage, someone of low moral character who doesn't mind being a con-man, he's a joker, a sweet talker, and he's good with his hands and mouth.
Don't talk to Jimmy over there, he's a Flim Flam, he'll take you for every penny you got.