When exotic dancers open their legs for you to throw your coins into their poon as tips. Often, as a funny/mean trick, one might coat the coins with an exciting new STD, preferably aids to add to the ho's collection. In some countries they hold Punani Cointoss Olympics.
After a long night of working at the club, Shanikwa felt a burning sensation coming from her poon. "Ah damn nigga, I must have caught an STD from that wild game of Punani Cointoss!... It was worth it...Nigga"