A ringer is an aspiring professional gamer. They can usually be found honing their skills by pwning noobs. They're always on the look out to fill in the last spot of a team or competition.
A good ringer will often display the qualities of a grinder, putting an insane amount of time and effort in their game and grinding out every little advantage they can get.
The term is believed to have originated from the early days of competitive Counter Strike, a well known first person shooter video game.
Someone whos life revolves soulfully around Lord Of The Rings; the best movie ever. They have seen each movie well over 100 times and knows every line. Ringers can often be found quoting the movie/book in real life conversations.
Ringers will colect anything that has Lord Of The Rings on it even if it is a tag off the back of their shirt.
friend: my life sucks. i have no reason left to live.
ringer: there's some good in this world and it's worth fighting for.
friend: ...
When having sex with a girl that uses Nuvaring as contraception, the ring slips over your penis and is subsequently pulled out of the vagina. A real accomplishment.
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.