HMS Frolic was an 18-gun Cruizer-class brig-sloop of the Royal Navy. She was built by Boole, of Bridport and was launched on 9 February 1806. Although she took part in the capture of Martinique, Guadaloupe, and Saint Martin, she appears to have had an uneventful career until 8 October 1812, when the American sloop-of-war USS Wasp captured her after a fierce fight. Later that day the British recaptured Frolic and captured Wasp. Frolic was broken up in 1813.

The Cruizer class was an 18-gun class of brig-sloops of the Royal Navy. Brig-sloops were the same as ship-sloops except for their rigging. A ship-sloop was rigged with three masts whereas a brig-sloop was rigged as a brig with only a fore mast and a main mast.