naked handshake
A greeting between two guys who either have no clothes on or just want to show off by pulling each other's dicks like it's the start of a wrestling match.
At the hotel, the two guys did a naked handshake and then went to the bar.
At the concert, the two guys did a naked handshake and then jumped into the crowd.
At the mall, the two guys did a naked handshake and then walked into the food court like it was a big deal.