Dippo is a brand of lighter featured in Grand Theft Auto: San Andreas, Grand Theft Auto IV and The Lost and Damned. It is seen in the missions Misappropriation (where Eddie Pulaski uses Dippo lighter fluid for the barbecue in the cutscene), The Master and the Molotov, Wrong is Right and It's War. It is likely a parody of the famous lighter brand Zippo.
The Dippo lighter was originally going to return in GTA V, as seen in a pre-release artwork showing Trevor holding a Jerry Can with a lit Dippo in his right hand. However, the Dippo lighter does not appear anywhere in the game, hinting that it was removed from the final version.