A Queens robber gleefully stuck his tongue out at a chain store’s security guard as he made off with stolen merchandise, police said Sunday.

The thief stole an undetermined amount of goods — including the black bag he’s seen toting — from the Burlington Coat Factory on Queens Boulevard in Rego Park on the afternoon of May 17, police said.

The store’s security guards tried to stop him, but he flashed what appeared to be a gun in his waistband, authorities said.

The crook then stuck his tongue out as he was fleeing the store.

He has not been arrested, police said.