The word means Anti U-Tube Troll Police. These kids are about 6-11 and make videos like "KLASKY CUPO EFFCTS ROUDN 1 VS ME AND EVRY1" or "SHUT THE FCUK UP!1!!1!!! ROUND 123456789098765432 VS eVERYOEN". They even try to terminate UTTP (U-Tube Troll Police) but they fail everytime. Don't forget they use the slang term "Kiko".
AUTTP user: U FKING DCIKHED YOU PUT DGO IN MICROWAV YOU IDIOT1111!1
Normal user: You know it isn't real, right? It is just animated.
AUTTP user: SHUT THE FCUK UP NO IT IS REAL @Normal user, KIKO!!1!11!!1