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same head is slang for a person with Down syndrome, on account of all their heads appearing to be the same.
“Oh, here we go again Robbie, look at the state of these same head cunts.”

Or~

“Why, I say Robbie don’t those two spastics appear to have the same head.

“Yes Ollie, they are same heads.”
by Hairyswan August 03, 2018
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Someone who works in a call centre, loves pop R&B, shops in Primark/H&M/Top Shop/Man, goes out to Walkabout/Slug & Lettuce and the like every week and likes whatever the media tells them to, and thinks they're brilliant for it.
This city is full of same heads, let's go underground
by baldmosher June 30, 2006
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