BLEH full form Meaning : Expression of boredomCategory : GeneralSub Category :Online Slang Type : Simile What does BLEH mean or stand for ?Bleh or blah is an Expression of boredom that is used online to show disinterest in a particular topic that is being spoken about. Related Terms BLAH full formBAH full formCODE9 full formBOOM full formGTGFN full formGUDD full formCREEPER full form Similar AcronymsT. A. full formTFTA full formT/C full formTGTBT full formTGZ full form