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 feeling a bit knackered today.

After shagging that bird, I was extremely knackerd

"Hey Brad you want a blow Job" - Molly
"Im still knackered from when we had sex 30 mins ago" - Brad

I was knackered after drinking wine.

See that cunt there? Yeah he's a knacker and a half that lad