In a corny manner; in a hackneyed, trite, or overly sentimental way.
From 'corny' with the adverbial suffix -ly, creating an adverb form. Describes the manner in which something is done in an unsophisticated or sentimental way.
Comedians sometimes lean into corniness cornily—they'll deliberately tell the most groan-worthy jokes because the audience's reaction is part of the fun!
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