A plimsoll.
Elaborate handshake, especially hooking thumbs.
A fist bump.
To drop the bait gently onto the surface of the water.
To run or go somewhere quickly.
To create a hollow indentation.
To greet with a dap.
A rubber-soled lace-up canvas shoe for sports or onboard ships; a precursor of trainers.
The plimsoll symbol ⦵ (or o) that is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point.