Grand Theft Auto: San Andreas Easter Egg - Parrot Scarface Line
In a cutscene in Caligula's Casino mission, listen to the parrot called Tony and he quotes: "I never f***ed anyone over in my life that didn't have it coming to 'em.", from the movie 'Scarface'.
Grand Theft Auto: San Andreas Easter Egg - "Fire Crotch"
At the Pig Pen Strib Club in East Los Santos you can easily find a stripper with an extremely skimpy bottom. Along with this treat you'll see flames coming out of her nether region = Fire Crotch. "Fire Crotch" is, of course, slang for V.D.
In Los Santos at Verona Beach, look at one of the movie theater buildings and on the building it says "The Last of the Mullet" and under it says "Reservoir Dregs" and if you saw the early 90s movie "Reservoir Dogs" you would know that it's an exact parody title of the movie "Reservoir Dogs."
Source: Easter Egg Archive