Sibilance

[PussyCat]

[Sibilance] is the sound someone makes when saying words that make the tongue push air through the front of [the teeth], such as zip [jeep] ship and chip. It can also refer to the non-word sounds that someone would make when getting someones attention (Ssst!) or telling one to be quiet (shhhh!).

[Zipporah Schumaker]

[The noise] a [queef] makes.

[Dave Paprocki]

[A word] used to [test] [microphones].

[Hina Muqadas]

something you will [learn] in [school] but you will never fucking use [in real life]!!!!