The meaning of SQUIRM is to twist about like a worm : fidget. How to use squirm in a sentence. to twist about like a worm : fidget… See the full definition. Games; Games; Word of the Day; Grammar; Wordplay; Rhymes; Word Finder; Thesaurus; Join MWU; Shop; Books; Merch; Settings; My Words; Recents; Account; Log Out More. ...