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?".
When you don't trust a friend enough to let them get close to you.
When to wear a "friendship condom"? - when you are still friends but you don't open up to them or get close emotionally in fear of them being fake with bad intentions.