When a penis enters an arsehole or vagina, or infact any orifice on someone elses body, the person on the other end of the guys penis becomes a cock kebab, be the person male, female or other. This is because that person has become impaled upon said penis, therefore resembling a kebab on a skewer at a BBQ.
Kizza: I reckon you invited Mike over and got him drunk because you wanted to get laid, but got cold feet.
Georgie: Wait, you think I invited Mike over, got him drunk for a shag, then decided no, I didn't want to become a cock kebab and backed out?
Kizza: Yeah. Like the term cock kebab by the way :D