Typically dumb female with an otherwise normal name, who shortens or substitutes her name and ends with an "i", under the mistaken belief that this will make her look more interesting and "kookier". It does, in fact, only makes her look like a silly slut who'll do anything to catch men's attention.

For example:

Mandy - Mandi
Susan - Suzi
Margaret - Maggi
Nicola - Nikki

An extreme example of this is the "double I-Slut", where two "ii"s are used instead of just one, rendering the female even sillier and slutier. Often seen with hearts dotting the i's.
Example 1:
Jennifer was thinking of changing her name to Jenni, but was worried about looking like an i-slut.

Example 2:
Office Jock 1: This hot new chick called Kristii has started is temping at our office this morning.
Office Jock 2: Oh man, a double i-slut!! Have you fucked her yet?
by jpeterman July 5, 2006
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Someone who has to own every single apple product.
E.g: I pod,i mac,i phone, just coz theres a new one out not there old ones dont work.
"see that chick in the office, she fucken got every apple i product

each i pod, shuffle, nano, all that shit
Fucken i mac and shit she even got the new i phone 4g with a new cover each day

when there was nothing wrong with her old original one
What an I-SLUT!"
by KingKrnz88 November 16, 2010
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