Facebook Franker

An individual that has to log on to somebody's facebook account to send a message because they do not have an account.

(Mom) Hey Steve send Hanna a message on facebook and see how she's doing. (Steve, son #1) No mom I don't like her anymore. (Mom) Fine I'm gonna go on dad's account and send her one. (son #2) Mom don't be a facebook franker....

In this case the mom is the facebook franker