1) Belt under the waist 2) Crotch shot 3) Fictional cult 4) Uncalled-for insult 5) Unfair attack 6) Unfair criticism 7) Unsportsmanlike action 8) Unsportsmanlike move 
[n] - unscrupulous abuse
noun unscrupulous abuse
Although technically a bunch that is below the belt, more often than not, refers to a boxer being hit in the genitals.
foul blow to the area below the stomach, including the genitals
(in boxing) an illegal blow below the waist of an opponent. · an unfair or unsportsmanlike criticism or attack.
Punch deemed by the referee to be below the legal level.
This is any punch that is thrown or strays below the waistband of a boxer?s trunks. It can also be an imaginary line at the base of the midsection, where the referee had deemed illegal.