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A word used to offend a slimboy who's not fat at all.
"Oi gayboy"
"Shutup!.......Phatboy, lose some weight"
Phatboy by Jimbo June 27, 2004
Related Words
A boy who is in the phandom (yes they do exist)
IM SUCH A PHANBOY!!1!11!
phanboy by beep_boop_ June 28, 2016

PhatBook 

A phat MacBook. For example, one that has been heavily upgraded, or has been modified in some visual or non-visual way.
First guy: "Dude, that guy's Mac is a total PHATBOOK!"
Second guy: "Nah, he just put an orange swirly hardcover on it."
First guy: "But orange swirl hardcovers are phat!"
Second guy: *sighs*
PhatBook by The.Boone February 23, 2010
A person who is so misinformed that they will go to extreme lengths in order to defend the phantom console.

One such reported case was not visiting dying kin.
"I have way better things to do at the moment like to run down to the hospital to see if my grandpa is alive, i was due long ago but i got caught up trying to defend a business needing a chance." -Said after debating prophantom.
phanboy by Parasite January 15, 2004
An obsolete music storage/playback device. Used mainly with Volkswagen and Audi original equipment stereo systems (but, it does have other uses).

Originally sold for hundreds of dollars, until demand for the unit was so low, one could be bought for around $100.

Phatbox is no longer in production.
I can't believe I bought this Phatbox. I would rather have an Ipod!
phatbox by merlin608 October 9, 2006
A large, juicy, swollen vagina.

(see: phat rabbit)
I was both disgusted and intrigued by her phatbox.
PHATBOX by merlin608 October 10, 2006