2
New Hampshire, derived from New Hampshire's zip code.
"I'm representing the 603"

"I was born and raised in the 603"
by protocoldroid June 18, 2004
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3
Removing a used condom and slapping a female in the face post sex. Usually takes place in backseat of a Toyota 4runner.

Dude after i banged that slut she told me she had herpes so i repped the 603, i think i hit her in the eye.
by Albatross May 15, 2006
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4
Bullshit area code for New Hampshit. The. whole. fucking. piece. of. shit. state.
603 sucks balls don't live here unless ur a ninja
by massgirl4lyfex15 September 24, 2007
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5
An infamous hood in Iceland. Located in the town Akureyri 603 is the home of many thugs and goons
by Cookiecow January 11, 2017
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