These people are generally the source of funds that allow the scene to exist because they have jobs.
'Super' is often added to strengthen the word (ie a supercustie)
As verb: I totally custied Mike. He got custie.
Custies are often those who use drugs occasionally at most and are not aware of the street value of a said drug, nor of what denotes quality. As such, they are easy targets.
Person one - They won't buy acid for $15 a hit, man. You got that shit for $6 a hit.
Person two - Dem's custies, nig!
2 "i cut these quarter inch doses down to 10mm and sold them to that custie he pissed himself he was so excited"
3 "man did you hear about mark? he got his wings ripped off! what a custie fuck"