Yelp v. i. : To boast.

Yelp v. i. : To utter a sharp, quick cry, as a hound; to bark shrilly with eagerness, pain, or fear; to yaup.

Yelp n. : A sharp, quick cry; a bark.

Example:
Yelp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!?

Taxonomy
San Francisco, Yelp San Francisco, Dentists, Doctors, Restaurants, Shopping, Los Angeles, New York, Near You, San Francisco Restaurants, Seattle, spa, Bars, Beauty Salons, Nightlife, massage, Good Pizza, frozen yogurt.

Defination from the web:
Yelp is a local business guide that returns results based on user recommendations. The directory covers a number of major U.S. cities and includes restaurants, services, and shopping.