From Longman Dictionary of Contemporary Englishblagblag /blæɡ/ verb (blagged, blagging) [intransitive, transitive] British English informal PERSUADEto obtain something you want by talking in a clever way He blagged his way in by saying he was a friend of the owner.→ See Verb table
Examples from the Corpus
blag• You blag a meeting with the band's lynchpin, organist Clint Boon.• He tries in vain to blag my laminate off me.• Don't bother trying to blag yourself a ticket - everyone pays 15 quid.Origin blag (1900-2000) Probably from blag “to steal” ((19-21 centuries)) 