This noun refers to one who practises the act of licking and sucking a man's penis. Please note that the feminine standard noun is fellatrix (plural fellatrices).
Really, you are considered the best flute at school!
Melanie was a disaster as a fluter and a tragedy as a fuck.
To blow on one's shaft while simultaneously running your fingers up and down in various patterns. As to mock playing an instrument in order to get your partner to hit higher notes!
If that motherfucker plays his cardsright i'm going to flute him tonight.