Crossword clues for Expert, in slang 4 letters:ONERGreat expert: Slang.ONERA real expert: Slang.ERICSlang expert PartridgeONERExpert: Slang.WHIZExpert, in slangSHARKExpert: Slang.ONERSGreat experts: Slang.PETEMANNitroglycerin expert: Slang.SHARKSExperts: slang.HEPCATJazz expert: Slang.GEEKSComputer experts, in slangDABHANDExpert, in slangQUANTWall Street numbers expert, in slangQUANTJOCKCorporate number analysis expert, in slangSHARKSExperts in a given ability: Slang.