What is Crackdar?
1.
The ability to perceive the signs that a neighbourhood or area has gone over to the crack trade.
The ability to perceive serious hard drug use in others.
"Wow, my crackdar really must be off! I totally missed that girl's track marks and the wasted guy passed out in the parking lot."
"Don't you know she's got a serious drug problem? Dude, what's wrong with your crackdar?"
See