1) The insertion of a nutsack into the anus. Possibly getting poo particles on the sack.
2) The repetitive insertion of a nutsack into the anus. Poo particles guaranteed.
3) Leads to bools (see bools)
1) That chick just got buttbagged by some manwhore.
2) After being buttbagged, Romeo's asshole was sore, and Josh had poo on his dick.
3) Brad's dick was all bools after he buttbagged Wendy.
4) You're a buttbag.
5) Stop buttbagging my mom!
6) *Ahem* Buttbag. That is all.
The act of having sex with a Beanbag, or Beanie Babies.
Most common in frustrated teenaged males. May result in friction burns to the penis and very crusty furniture.
A sexual act where the male will put his testicles inside of another person's asshole or vagina, and penetrates with it. If the participant is a female, you can even double penetrate each hole, one with the testies, the other with the penis.
I tried beanbagging my wife yesterday, we were laughing so hardtrying to get my balls inside of her but it felt so good once it was complete.