"You canker blossom!" 3 Shakespearean Insults
1570s, "narrow opening into a coast, arm of the sea," a special use of Middle English inleten "to let in" (c.1300), from in + let (v.). In this sense said by old sources to be originally a Kentish term.
inlet in·let (ĭn'lět', -lĭt)n. A passage leading into a cavity.