When a man is fucking his partner doggy style and punches his partner in the back of the head (@ the madulla ablongata) when his partner is about to come, making the brain spasm as his partner comes. Also known as a "donkey punch".
Guy 1 - " Bro, did you see that girl I hooked up with on Valentines Day ? "
Guy 2 - " Nah bro I was busy at work "
Guy 1 - " Dude I'm telling you she was a straight up Macalla Kat for real "
Guy 2 - " No way ! "