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1.
Noun:
A flirty cellphone text message, i.e. a text showing casual sexual attraction.

Verb:
To create and send such a message.
One sec... just let me finish up this flirtext to that cute girl I met last night

Quit flirtexting and get back to work!
by PohTayToez March 18, 2008
 
2.
v. To engage in flirtatious text message exchange
I was flirtexting Mike all night long and a little bit this morning.
by LGhaha April 20, 2008