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"
by RockCat October 19, 2005
(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.
Dude, are you on ringer right now?
by Totesonringer101 July 21, 2010
A person who you barely know that you bring/send to a party to make things interesting. Can also be someone you find on the street a few blocks away.
Who's that ringer you left at my house last night? I couldn't get rid of that guy for days. He shit on my brother's rug.
by butchasound September 18, 2007