An ugly girl/guy - so ugly he/she needs to be clapped (physically).
Me: "Did you see James making out with that girl?"
You: "Yeah, but she was clapped though!"
A strange but common way of applauding something or someone
Clapping guy: "Oh I like what is happening right now let me smash my hands together to express my delight"
Clapping it is when you are having sexual intercorse and you are humping so vigorously that it creates a clapping noise.
I was clapping it with that girl I hooked up with last night.