"Tannshou / طنشوه" - Lebanese Slang meaning "ignore him", or turn a "deaf ear" to him! 

Sample conversation:

Person 1: "He asked me to call him once we know what our plan is for the evening, so he joins us"

Person 2: "Dude, he is such a bore, forget about him, don't call back, "Tannshou / طنشوه"!"