The bilabial nasal click is a click consonant found in some of the languages of southern Africa. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ʘ̃⟩ or ⟨ᵑʘ⟩.
The airstream mechanism is lingual ingressive (also known as velaric ingressive), which means a pocket of air trapped between two closures is rarefied by a "sucking" action of the tongue, rather than being moved by the glottis or the lungs/diaphragm. The release of the forward closure produces the "click" sound. Voiced and nasal clicks have a simultaneous pulmonic egressive airstream.
Bilabial nasal clicks only occur in the Tuu and Kx'a families of southern Africa, in the Australian ritual language Damin, and for /mw/ in some of the languages neighboring Shona, such as at least for some speakers of Ndau and Tonga.
The Tuu and Kx'a languages also have glottalized nasal clicks. These are formed by closing the glottis so that the click is pronounced in silence; however, any preceding vowel will be nasalized.
