601er 

One of those people that always try to one-up you (named after those pesky folk on "The Price is Right" who always outbid their opponants by $1)

... and then she's all, "well my car gots chrome rims AND tinted windows." And I was like, "601er best be gettin' outta my face."

601er by elsenore July 14, 2003

601-er 

Someone who continuously one-ups someone else.

On the show "The Price is Right", when someone bids 600, there's always somebody who has to bid 601. "I just adopted a dog from the pound." "Well I just rescued a whole litter of puppies from the sewer." "Dude, don't be a 601-er."

601-er by Nicoliosis April 28, 2006

609er 

the act of dabbing so hard you dislocate your knee

bob: i just pulled a 609er
bobby: oh shit man i just pulled a 69er
bob: get me to a hospital pervert, you're seven.

609er by 14e45e December 9, 2019

609er 

Pronounced as six-oh-nine-er, it is slang used to call people who are over the age of 70 having casual sex with people of all ages.

Josh: Dude what's wrong?

Travis: God I just found out my grandpa is a 609er!

Josh: Seriously?

Travis: Yeah! He slept with my friend Betty!

609er by dontuseyourrealnamemyass December 9, 2019