Nicked

Used after making a critical error.
Or
Being that physically exhausted/ drained that can no longer properly function.
Or

Being in an uncomfortable situation

*gets on a rollercoaster and wants to get off last second - “I’m nicked”
Or
*Leaves a 2000 word assignment until the day before it’s due “I’m nicked”
Or

“I ran a marathon yesterday and my legs are nicked”