Answer:
I think it is LERRE. Not pronounced like Leere, but pronounced like leh(lemon)-rreh. Soft sounding of the e. Not sure if this is some near language to lebanese???.
^
I'm lebanese. Lerre, Lehre, Lehherehrhehh.. none of this exists in Lebanese. To say shut up, I would say "Skot" (that's a long O). Some less respecting lebanese would say "Nsadd" or "Sedd boozak" (meaning "Shut" or "Shut your mouth (though litterally a "booz" is the mouth of an animal)".