1. I was knackered when I got in from work.
2. After my seventh ejaculation I was well and truly knackered.
3. The teacher caught us smoking and now we're going to get really knackered.
4. I tried to fix my dad's PC but now it's more knackered than ever.

I'm absolutley knackered, i've been working all day.

I'm feeling a bit knackered today.

After shagging that bird, I was extremely knackerd

On my feet all day and I'm knackered.

The rider forgot to eat before the last climb of the day and he was completely knackered half way up.

i'm knackered after last night