yelper

noun3

1. •
   One who yelps.

   • Mr. Longstreth, who can be a bit of a yelper, sang sweetly, perhaps in search of contrast. — 2009
2. •
   (dialect, UK) The avocet.
3. •
   (dialect, US) A bird, the tattler.

noun1

1. •
   (Internet) A user of Yelp, an Internet service that publishes crowdsourced reviews of local businesses.