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3.
Flirting with a friend or significant other using a text message. Seen as a precursor to sexting.
I've been flexting with this chick for weeks. Tonight's the big night. I think we might start sexting.
by wordmaestro August 31, 2011
 
1.
A person texts so much, to the extent that it becomes regular excersize and said person's hands and arms become very muscular.
Because of flexting, I can text 320 words a minutes and bench my new, hotter girlfriend.
by raichupal May 16, 2011
 
2.
Striking a body builder-like pose while sending a text message. Quite common on the beaches of California but also observed at North Avenue Beach in Chicago.
After a workout at Muscle Beach, Win, ripped and glistening with sweat, was flexting some girl he met at the club last night.
by win williams November 09, 2008
 
4.
Flexing and texting simultaneously. Strengthens those arm muscles unlike any workout in the weight room.
"Flexting really saves me time! Every time I text someone I just get a nice flext in and then I don't have to hit the weight room!"
by G Bags January 15, 2013
 
5.
When guys get excited texting each other about "guy" stuff.

A text session that makes a guy so amped up he unkwittingly starts flexing his muscles.
Jake and Jaheem were flexting each other about who's car was faster.
by Ambular September 30, 2013
 
6.
Flirting + texting. the act of text messaging someone to get attention from a person you are interested in. No matter if the person you are texting has a gf/bf.

In a sentance:
Boyfriend: Jenny keeps texting me at random times in the day. You know, just stupid stuff. But, that doesn't mean she wants me!
Girlfriend: It's called FLEXTING, and it's STILL FLIRTING!!!
flexting in action:

Nancy: What are you up to?
Bob: nothing
Nancy: i miss you
Bob: yeah, we should hang out sometime
Nancy: like soon!
Bob: I know, i'm prettty busy these days with work and my girlfriend
nancy: :(
by J Zam June 18, 2009
 
7.
Flirting through texting. That stage when you're not really sure if you're interested, but flirt hard-core through texting. You know what we're talking about.
I started flexting this girl, but she was dropping too many LOL's so I stopped.
by AZG823 November 17, 2009