An engeltool is one who extremely exaggerates or lie about his state of sobriety. Often times an Engeltool will even pretend he is either drunk or high after drinking O'douls brand beer or smoking a cigarette.
Kevin: Oh my god!
Kevin: I'm still drunk from the Bahamas!!
James: You got back from the Bahamas a week ago, tool.
Wes: Don't worry about this guy bros, he is an Engeltool.