skylark (n.) Look up skylark at Dictionary.com
the common European lark, 1680s, from sky (n.) + lark (n.1). So called because it sings as it mounts toward the sky in flight.
skylark (v.) Look up skylark at Dictionary.com
"to frolic or play," 1809, originally nautical, in reference to "wanton play about the rigging, and tops," probably from skylark (n.), influenced by (or from) lark (n.2). Related: Skylarked; skylarking.