The haybaler is the classic sex move where one does the following:
1. Shave off all one's pubic hairs and put them in a little bag.
2. Start having sex with someone doggy-style.
3. Take the shaven pubic hairs out of the bag and stuff them in the ass of the fucked doggy-style person.
4. Stuff the cock in the person's ass and ram the pubes down.
5. When the person shits next, they shit out a pubic hair/shit hay bale.
Man 1: Dude, that chick is pretty hot but she's a total bitch.
Man 2: Yeah I'm gonna nail her with a haybaler tonight.
Haybaleboi is a fictional character in the Crunch Ville smp. He is a very intelligent and cocky individual. Legend has it he was once a normal hay bale but turned into a human after a radiation leak.