You're on the phone. Long enough to make your ear uncomfortable. So you switch ears. But next thing you know, the person on the other end of the conversation starts up a juicy story or whatnot. So you switch back to your favorite ear. Thus is born, REW: right ear worthy. Example: Betty: .....so then, he told me he's pregnant! Larry: Shreak! That is sooo REW!
REW
Meaning of REW in English
Slang English vocab. Английский сленговый словарь. 2012