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an injury, illness, or condition derived from the indulgance of decadent or promiscuous activities. Any injury that happens while drunk and/or partying, usually hallmarked by a either not being able to either remember, or gracefully explain, how it happened.
Whoa, check out this bruise on my leg, where did it come from?

Dude you were totally wasted, thats one serious sinjury
Sinjury by TheJAG77 December 27, 2009
Related Words
An injury sustained during sex.
One example of a sinjury is pulling a muscle during intercourse.
Sinjury by Dr Sinjury January 15, 2009
An injury to the skin. Can include cuts, scratches, piercings, blisters, accidents...

A portmanteau word combining 'skin' and 'injury'.
'Damn, the rabbit just bit me. That's another skinjury to add to the collection after the scratches I got from him yesterday.'

'Check out my new skinjury - I got my my belly button pierced again!'
skinjury by Anticelebrity August 15, 2009
An injury acquired during sex.
Man, check out my sinjury I got while trying to fuck in that Pontiac Firefly last night. I haven't walked straight since...
Sinjury by Fawkward69 December 28, 2009

shinjury 

That cunt gave me a shinjury so I gave her a bukkake.
shinjury by JesusKrist April 26, 2004

spinjury 

An injury sustained from spinning too hard, usually when drunk
Dave got a spinjury after spinning too hard on his motorbike, and he fell off
spinjury by EvanKnish March 25, 2022