Yo-yoer

A person who uses other people like yo-yos.
similar to a player but with a less negative connotation
Or a person who just changes their mind about liking a person a lot.

We gotta be yo-yoers, we're gonna play those guys, not let them play us!

He said he wanted me, then he didn't, then he wanted me back. What a yo-yoer.

Yo-yoer by Erica Marie March 19, 2008

Yo-yoer

A person who is unable to stay for an extended period of time in silent study areas of university libraries.

Helen is a yo-yoer.

Yo-yoer by Shkorf February 19, 2011

Yo-Yo-er 

someone who uses the word "Yo" too much.

person 1: huh?
person 2: TEEN ANGST, YO
person 1: like, they have anxiety?
person 2: Teen Angst is satire, YO.
person 1: you have officially used up all your YOs for the day.
person 2: hahaha. The second one was just a repeat of the first. Does that still count?
person 1: no, but you're an official Yo-Yo-er.

Yo-Yo-er by djtronika January 5, 2012

yoyoer 

one who demonstrates an expertise in the area of yoyos and has mastered yoyo tricks.

Yoyoer champs include the following Mark Montgomery (AP) US
Johnnie DelValle (A) USA Shinji Saito (AA) Japan Daisuke Shimada (AAA) Japan Rafael Matsunga (CW) Brazil Eiji Okuyama (OS) Japan.

yoyoer by G squared October 26, 2006