shhh

a sound made by the lips usually to queue a loud person to stop. (i.e that guy on the start screen before an among us match starts)

John: "SHHH"
annoying brother: *stops yelling*

Among us charachter: "SHHHH"
You're the Imposter.

Brrrrt

The Sound of an A-10 Warthog

You look up to the skies during a battle in Iraq.
You hear the loud "Brrrrt" of an A-10 Warthog coming in, pummeling the enemy front lines.
You began to cheer on the flying tank as it fired at the enemy lines ahead of you...