The billboard.
True Grime Street Cleaners is a sanitation business which is advertised in billboards around the state of San Andreas. Its slogan is "Get rid of old rubbish, fast!" and its name is a parody of the GTA clone game "True Crime: Streets of LA". It may be a reference to the term that police officers (the character who you play in True Crime is a detective with the LAPD) are occasionally referred to as 'garbage men with badges.' "TRUEGRIME" is also a cheat for summoning a Trashmaster on the PC version. It is also a psychological warfare believe to be discouraging people from playing "True Crime: Streets of LA".