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1.
Jimmi can be used in the place of any of the following words:

sexy, crazy, hot, explosion, fuck, sneeze, sex, amazing, unbelievable.

When used in a sentence it must be capitalized and followed by an orgasm of some kind.
Examples:

"Wow, that was so Jimmi!"

"That's so fucking Jimmi..."

"Damn, that's Jimmi."
by Jimmi Baez February 07, 2008
 
2.
a really sexy dude from california
Hubba Hubba That guy is a jimmi
by anonymous heartthrob November 26, 2003