sistatwista
Oral sex between two allegedly heterosexual female friends, intensified when said friends are wasted. Meant in a "no-homo" fashion.
Bro 1: Did my gf hookup with yours last night ?
Bro 2: It was a sistatwista. Totally hot, brah!
Bro 2: It was a sistatwista. Totally hot, brah!