Metweet 

A retweet of someone else's tweet portraying the retweeter in an overly positive light.

I really should keep up with what my local MP's doing, but George Galloway's constant metweets are driving me insane.

Metweet by somnolentsurfer February 5, 2013

mctweety 

A person with hair that looks like a bird of the McDonald's logo.

Don't appreciate the attitude Mctweety!

mctweety by Deka101 April 25, 2017