Et si on se tutoyait ? - How about if we use "tu" with one another? (more or less equivalent to "call me by my first name")
Vous ne devriez pas tutoyer vos professeurs - You shouldn't use "tu" with your teachers
Related: le tutoiement - the act of using "tu"; vouvoyer - to use "vous"
Learn the difference: tu vs vous
(click the little graphic below to hear the Mot du jour pronounced)