extramarital text 

Flirtatious or seductive phone texting or email to a person other than one's significant other.

Dude, my baby's lost interest in me. She's on that phone all the time. I think she's having extramarital text.

Yeah, Bro, I just got a booty text from her!

extramarital text by weteachourselves August 14, 2011

extramarital text 

Texting a member of the opposite sex, who is not one's spouse or partner, for the primary purpose of flirting.

Sue: That guy I bumped into at the bar just texted me three times to meet for a drink later. Bob keeps grabbing my phone to see who it is.
Mary: Well, you're hot, Girl! That won't be the first time you got caught having extramarital text.

extramarital text by redshirt58 August 22, 2011

textramarital affair

The art of cheating on your partner using text messages.

The neighbor girl and I are having a textramarital affair!

textramarital affair by Born Lucky May 27, 2010