Afrikaans in origin - poes (vagina) and klap (slap). Pronounced "poosklup" with long "oo". Rhymes with goosecup if that was actually a word. It is the type of slap administered to a recipients head in such a way that their eyes bug out, their sphincters let go and their descendants end up sporting black eyes and stunted mental development.
A lekker warm klap that hits you with brute force and sends you spinning on your axis before dropping you like a sack of potatoes.
Juslike! Piet got a poesklap from that dude! He didn't check it coming and it sent him spinning like a top. Piet shat his pants and dropped like a rock. Aira! That poesklap was a real tit shot to the jaw. Like Rocky Balboa.
a forcefull back hand slap similar to the pimpslap, except you hand is covered in ass crackclay.
my hoe told me she wanted me to quit pimping her out to all my uncles, and neighbors, so i pooslapped the bitch, shouted "YOU BEST RECONIZE!"... she got the message