flutter tongue 

A technique used when playing the flute. Flutter tonguing requires a flutist to role his/her tongue while playing, producing a gurgling sound effect.

I used flutter tongue while playing "Flight of the Bumblebee!"

flutter tongue by flautist07 December 20, 2010

Flutter Tonguing 

A sexual technique wherein two women 69, and use their tongues heavily.

Last night Carol came over, and we started flutter tonguing. It was amazing!

Flutter Tonguing by MuffMuncher66 March 11, 2021

tongue flitter 

when a male or female moves their tongue very fast on a clitoris

"ohh.. i love how you tongue flitter that pussy, you dirty boy"

tongue flitter by Daisy Lashes July 18, 2009