1. A threesome involving 3 folx of the same (relative/subjective) gender.
2. Group sex involving folx of all the same gender.
Kelso: "Hey Stan, my roomates are going to be out of town next weekend on business. Do you wand your partner Kyle want to come over for a Babadook viewing party?"
"Bitch, what were doing in your room last night? Sounded like a damn babadook viewing party"
"Hey babe, do you think we should bring strawberries and whipped cream to that babadook viewing party that Molly is hosting?"