A chest slap is a form of applause used at a music show when one hand is occupied with a cool refreshment (i.e. beer), thus not being able to clap with both hands.

When the time is right, the free hand is used to slap the opposite side of the chest (the right hand on the left side, for instance) to emulate a sound of respect and applause.
Some random local band: "That was our new single, Emotional Napsack".

Me: "That sucked, might as well chest clap them, dude."

The guy next to me: "Who are you? Shut up!"

by tommyhaych October 1, 2006
Get the chest clap mug.