What is the meaning of Corny?

Boring and unoriginal.

Hackneyed or excessively sentimental.

Uncool, stupid, lame.

Containing corn.

Producing corn or grain; furnished with grains of corn.

Tipsy; drunk.

Horny .

Strong, stiff, or hard, like a horn; resembling horn.

fleshy, swollen

containing corn; tasting of malt, tasting well of malt, malty

resembling a grain

Source: wiktionary.org