come it verb7 •(UK, slang) To be impudent.Don't come it with me! •(UK, slang) To pretend. •(UK, slang) To exaggerate. •(slang, no longer used) To succeed in a trick of any sort.I have got the Yacks, so do not come it. Fight cocum. — 1859 •(slang, no longer used) To inform or disclose. •(slang, no longer used) To proceed at a great rate. •(slang, no longer used) To show signs of fear. formscame it · coming it · comes it