When you are such a flirt other people catch it...its like a yawn...you start flirting and then everyone else does to...most likely with hott kids. its a cold..evryone gets it!
girl: i never flirt cause i i have a boyfriend, but alex makes me flirt soo much
girl2:i no! its cause he is flirtagious...
Adjective. A trait above and beyond simply being flirtatious. Specifically, when someone's flirtatiousness becomes contagious.
That Jack is flirtagious! Either that or the beer is making me flirtatious tonight.