Onion noun 1forms 1phrases 3 noun1 •(slang) An inhabitant of Bermuda; a Bermudian. formsOnions Phrases with Onion eat the onionTo be fooled by a work of satire, particularly in the satirical newspaper The Onion. peel the onionTo investigate a matter more deeply, usually step by step, each step leading to a new discovery. take out an onionSuggests that the performer of the action is not sincere in their grief.