Country Dictionary

injure oneself in the testicles, usually through a hard blow or landing

that football player just knackerated himself on the goal post

Road-man term to describe something as being annoying

Nah g, that's well knackering

the knacker man, as in "fit for the knackers" i.e. exhausted, dead

eeh by gum, ah wuz fit for knackers

sexually tired;
an old horse thats going to the glue factory.

Something annoying

That is well knackers

having suffered an injury to the testicles

used almost always in the case where injury results from a fall from a beam with both legs going opposite sides of said beam

"I knackered myself when i fell off the monkey bars"

Your balls

That really twists my knackers, bro