(n.)One who you dislike enough to maliciously slap while engaging in intercourse, yet like enough to engage in intercourse with.
(v.) The act of slapping someone who your are engaged in intercourse with, for doijng something incredibly stupid in bed.
You're having sex...*insert various sounds of intercourse hear...he/she does something like biting, or inserting anything into somewhere it shouldn't be, and you slap the shit out of them, only to continue intercourse, then leave and never talk to them, that person, is a fuckslap(n.), what you did to them, is fuckslap(v.) them.
the act of slapping one's sexual partner with your cock. an alternative to dickslapping, most often with cock covered in vaginal or anal secretions
I fuckslapped her with my dick till she opened up