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1.
verb \ˈtwēt-ər\

1 : a person that uses Twitter to influence or lead by deceit, trick, or artifice

intransitive verb

1 : a person that uses Twitter to practice fraud or trickery

2 : to be sexually unfaithful via Twitter —usually used with on <was tweating on his wife>
I saw these direct messages on your Twitter account from some dude named Stanley. You are a tweater!!!!
by jimcolv October 11, 2012
 
2.
A Twitterer who frequently posts about their meals or favorite foods.
@bettycrocker is a real Tweater.
by Julie Wright July 30, 2008