Two girls one cup contians to female pornography stars defacating in each others mouths.
The video caused much controversy due to it's extreme graphic content. ;)
Guy2: Nah man, I've been feeling lonley lately so I'm gonna go "do the busting" to Two girls one cup
Often shown to an unsuspecting viewer(s) in order to gleefully observe his or her horrified reaction.
(Spoiler Alert! The following reveals elements of the video's "plot")
Sadistic Asshole: "Dude... check out this video of these two hot chicks 'making out'. He! He!".
Said Asshole's victim plays the video "Two Girls One Cup": Idyllic music plays.... Two attractive women ... Standard Lesbian foreplay ... then, at about 0:30 into the video....
Traumatized Victim (horrified and at the brink of nausea): "Are they ... Oh my God, No ... I can't believe ... Are they really, IS SHE EATING THE OTHER CHICK'S POO! AND, OH NO, SQUIRTING IT INTO THE OTHER CHICK'S MOUTH! PLEASE, I CAN'T WATCH ANYMORE!"
Sadistic Asshole: "Oh it gets better. So much better, so much tastier."
... the two women, apparently fed-up (hah! pun intended) with eating each other poop, wash their fecal-feast down with a generous helping of each other's vomit; could there by a more fitting denouement?...
Traumatized Victim (shaking): "Where am I? Its sooo cold in here... My life will never be the same... My whole worldview has been decimated ... Someone, please hold me. I am so scared ..."
Sadistic Asshole: "Ha Ha! Isn't technology wonderful!"