tick off verb4 •To sign an item on a list with a tick mark, especially as a signal that the item has been verified or completed.I ticked off Harry today because he announced he was present.I ticked three things off the list in my head, and had only four chores left to do. •(US, Canada) To annoy, aggravate.It really ticks me off when people don't use proper punctuation. •(UK, Australia) To reprimand.Fred was ticked off by the teacher for playing around in class. •To list (create or recite a list).In a lengthy missive dispatched the next afternoon, Wheeler ticked off a laundry list of reasons why he could not obey Bragg's order. — 2010 formsticked off · ticking off · ticks off