people or things that fire bullets or projectiles, or small glasses of liquor meant to be drunk quickly.
From shoot (Old English sceotan) + -er suffix creating 'one who shoots.' The word has been used for gunmen since at least the 1600s, with the drink meaning emerging in the 1980s.
The term 'shooter' shifted from exclusively meaning marksmen to mean small cocktails during the 1980s party culture, showing how the same word can get completely new meanings based on social trends.
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