bubble in

== English == === Verb === bubble in (third-person singular simple present bubbles in, present participle bubbling in, simple past and past participle bubbled in) (transitive) To mark a response on a form, particularly on a multiple-choice exam, by filling in a circular area (‘bubble’). 2020, Staff of the Princeton Review, Cracking the AP Statistics Exam, 2020 edition, page 76: Once you’ve answered all of the questions on one or two pages, bubble in your answers before turning the page. === Anagrams === Bubbline