Overtexter 

Someone who sends either a deluge of texts at once or sends many short texts.

I don't even like to text my mom because she's an overtexter.

Overtexter by DYOXN June 11, 2018

Overtexter 

A person who tries too hard to be noticed in WhatsApp groups causing unimaginable harm to good people by writing more than zillion meaningless messages per second

That poor lonely bastard is a major overtexter. I got 10 messages from him in the last five minutes

Overtexter by Erik_Mam April 8, 2018

overtweeter

Think of "overeater" but in the Twitter realm. Someone who tweets way too often, especially when they have their twitter connected to their facebook so you have to see their stupid inane tweets every three minutes on your newsfeed.

Overtweeter. Overeater. Same concept.

overtweeter by Gina July 29, 2011

over-texter 

A person who persistently sends long and boring text messages to your phone when it would be much easier to just call

Scott:Hmmmm it would appear that rodoliver has sent me one to many text messages, he is quite the over-texter

Joe:Ah yes, I concur

over-texter by Scott Garrett July 20, 2006

Over-texter 

Someone who texts a single person so much that it feels like the conversations never end. Sometimes the over-texting is so extreme that the over-textee starts ignoring the over-texter out of annoyance. These types of people are also often the ones who talk a lot.

Candice loves texting with Jeremy but she is a really bad over-texter because of it.

Over-texter by LexiesPlural October 5, 2020

Overtext 

When you text a person more than what you think is normal for you, depending on the kind of text personality you have, and it results in losing interest

"how was it with Jason?"
"I don't know, we overtexted last night and I'm kinda losing interest in him"

Overtext by ShadyAllTheWay July 15, 2020

overextend 

If someone exaggerates

Don't overextend in that case. Aliens don't exist. You overextend.

overextend by Baseult January 25, 2019