"Expired tags" refers to the situation when the registration or license sticker on a vehicle's license plate has reached its expiration date. Full definition
Why do I have to go stand in front of a judge just to tell him «yes, I was driving with expired tags.» (riddlethos.com)
Edit: They never towed but I found another sticker this morning saying they will tow tomorrow for expired tags. (law.stackexchange.com)
No reason unless I absolutely had to, and today I had to, because about two months ago I was pulled over and ticketed for driving with three - month expired tags. (riddlethos.com)