A person whom changes the serial codes on stolen cars. The serial numbers are generally found engraved onto the cars engine pieces, a ringer changes these engravings so it can not be identified by the authorities.
"i'm going to see a ringer to sort out my hot lexus"
(pseudoploximolarogen) the street name of a highly potent and exotic hallucinogen that is normally ingested with the mouth or some other orifice. Normally found in a rare mushroom harvested from various South American rainforests.