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1.
A female Kiwi (New Zealander). Especially the ones that non stop drink and party.
These fiwis are doing my head in mate.. they’ve been partying for the last 48 hours!!
by memzie December 20, 2010
 
2.
another meaning for cat, kitten, kitty or feline.
Awww look at the cute little fiwi. "I shoulda been a fiwi~.... I shoulda learned to lick my asssss~"
by Mac The Ripper September 27, 2012