ring ‧ er /ˈrɪŋə $ -ər/ BrE AmE noun [countable]
1 . someone who rings church bells or hand bells
2 . a piece of equipment that makes a ringing noise:
Turn down the ringer on your phone.
3 . someone who pretends not to have a skill that they really have, in order to play on a team, enter a competition etc
⇨ ↑ dead ringer