Knacker
Definition 1 of 3
Pro Tip 1/3
Colloquial Use
Used informally among friends or in casual conversation, not in formal speech or writing. I'm knackered after the gym session.
Pro Tip 2/3
British Slang
Predominantly a British term, might confuse speakers of other English varieties. Marathon training has me absolutely knackered!
Pro Tip 3/3
Physical Exhaustion
Often refers to being physically exhausted rather than emotionally or mentally tired. After moving all those boxes, I was knackered.