1) When one man takes his throbbing, erect penis, lubes it up then shoves it into another man's dirty dirty anus and thrusts up and down until he ejaculates.
2) The act of forcibly shoving a dry corncob into someone's anus, preferably done in the late evening hours and behind an outhouse.
1) Hey Sexy Pants! How 'bout we go back to your place and cornhole!
2) After Dan had sex with Bob's chicken, Bob and his friends grabbed Dan one night as he was coming out of the outhouse, pulled down his pants, and cornholed him.