look up any word, like blumpkin:
1) To be exhausted from a hard days work.
2) Unable to get wood due to excessive knobbing.
3) A gay phrase used by douchebags to try and make them believe they're having more sex than you.
Ben: "Ooooh yeah, after yesterdays exploits, I'm shagged out!"
Kevin: "What, those men tire you?"
by Jamie Douglas September 24, 2006
Akin to the word knackered.
Very tired.
I'm shagged out after last night.
by minges and all April 18, 2003