A horse fuck is when somebody with a humongous dick, aggressively fucks someone while they are on all fours. The person must be wearing a horse mask and has to release their seed in the mask. Once the mask is full of yucky frosting, the partner will drink it out of the mask.
A variation on the commonplace bullshit, or horse shit, horse-fuck denotes an occurrence of bullshit which is beyond encompassing by normal, logical sounding bs.
One of those rare insults, that can and will no matter how you say it, have a very harsh inflection on the word HORSE. try it now say in angry voice " Go fuck a horse "
and horse comes out like you mean it. now say it in a happy voice. Same inflection.
Due to all this awesomeness of the phrase "Go Fuck A Horse " it is considered in part, as the second best inflective insult, after PRICK.
a term usually used instead of fuck him/her. or when you just kicked the shit out ofsomething. after exclaiming that you have done so it would be followed buy "and then i fucked it/his/her horse."
"that guy is such a doucher. fuck his horse."
"dude screw that guy. lets fuck his horse."
"man i beat the hell out of that kid. and then i fucked his horse."