rat-tat-tat

== English == === Etymology === Onomatopoeic. === Interjection === rat-tat-tat! The sound made by knocking on a door with a hard object (such as a door knocker). The sound made by firing an automatic machine gun. === Noun === rat-tat-tat (plural rat-tat-tats) Such a sound. ==== Usage notes ==== The tat syllable may be repeated further to convey a sound of longer duration. ==== Translations ====