Knackered

[Rihanna]

Exhausted
Sexually spent
Reprimanded
Broken / malfunctional

[Couch Potatoe]

tired or sleepy; exhausted

[Jessica]

spent, near death.
Origin from knackers yard where one took old horses to become pots of glue.

[Couch Potatoe]

Very Tired

[Mark Zuckerberg]

to run out of energy during an endurance sporting event; to bonk.

[Sarah]

When you have recently blown your load and are very down and tired.

[Mark Zuckerberg]

Tired and exhausted. Completely spent and thus, useless.

[Jessica]

To be covered in semen or to be extremely tired.

[Britney]

tired after sex

[Tanya Shivari]

broken or too old to use: