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4.
1.Pants that are particularly fancy today.
2.Shoved on the end of anyone's name who happens to be particularly fancy.
N.B. Your fancyness can not exceed that of Lappo,Circus,Timothy and Bradley as they are all fancier than thou.
Hold your pinky up as high as you can and exclaim "Fancier than thou!"..as long as your pinky is the highest you are the fanciest...other than the aforementioned fancypantses.
by Spongebob Spliffpants August 23, 2003
 
1.
Someone who is dressed fancy or act in a fancy matter. usually accompinied by a "Mr." prefix.
We need to return your tuxedo tomorrow Mr. fancy pants.
by Mike Hoff February 16, 2004
 
2.
Sophisticated or impressive. See posh.
"Karin, your loft is so fancypants!"
by Gaelen May 31, 2006
 
3.
1. an overly dressed up person

2. an over-sophisticated person or thing
With his Fedora and his high end wines, he's your basic fancy pants and then some.
by The Return of Light Joker May 11, 2010
 
5.
A pretentious, rich, liberal post-teen from the north east
"Elizabeth is such a fancy pants fucker. What a rich bitch. I hope she enjoys that new 'tight pad' her daddy bought her."
by Jimmy Williams March 20, 2005
 
6.
a gay person
Say fancypants! or , Scott is a fancypants
by dan December 11, 2003
 
7.
Nickname for a co-worker that dresses up every Hall-o-ween with a prosthetic, rubber ass no matter what the costume. Ironically, every time the ass is placed on the body, the co-worker ends up in some sort of physical altercation. This is thought to originate from Salt Lake City, Utah (Home of the village idiots and mormoms).
"Why is Fancy Pants all busted up?"

"He was wearing the ass last night, and some guy grabbed it..."
by Krazyodb June 03, 2005