Contacting several friends you never talk to because you have nothing better to do. Like a real booty call, only with friendship rather than sex. Being someone's friendship booty call isn't necessarily a bad thing.
Emily: Liz just texted me "hey, havnt tlkd 2 u in 4ev, wanna hang out?".
Kate: That's a friendship booty call. She sent me the same thing. All her real friends are out of town.