Below The Belt
Meaning
Something which is not considered fair or correct.
Origin
Jack Broughton in 1743 drafted ring rules and used it as:
“That no person is to hit his Adversary when he is down, or seize him by the ham, the breeches, or any part below the waist a man on his knees to be reckoned down.”
The New York Daily Times also used it in June 1853:
“he will always respect that noble rule of pugilistic chivalry and ‘never strike below the belt’.”