The Best. Bright and Shinny, new. Niikii.cool.
Niikii is the spiffest person EVER!

I got the spiffest electric guitar ever made!
by Eriin May 24, 2007
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1. Verb: To dress up, especially stylishly.
2. Interjection: Exclamation similar to nifty or cool.
3. Proper Noun: Part of the name of Spaceman Spiff one of the many alter-egos of the ever-awesome Calvin, of Calvin and Hobbes.
4. Adjective: spiffy. Again, similar to nifty
5. Noun: spiffy. A cool, especially shiny, object.

Other variations include:
-Spiff-tastic (Adjective and interjection, combination of words spiff and fantastic
-Spiffmeister (Noun or title, one who is spiffy)
-Spiffify (verb, to make spiffy)
-Spiffig (adjective, English with German adjective suffix)
-Muy Spiffendo (Interjection, Spanglish)
-Spiffiness (Abstract noun, similar to "love" or "joy")

..and others.
1. You're all spiffed up today."
2. You won the contest? Spiff!
3. Spaceman Spiff, over and out.
4. That's a spiffy song.
5. Look at my spiffy! It's shiny!

-Wow! Spifftastic!
-You can just feel the spiffiness.
-I need to spiffify my outfit.
by Lady Chevalier April 9, 2004
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A smoke filter made of a toilet paper roll and fabric softner stuffed at 1 half with ducktape to hold it from coming out (but do no block off airway through). Blow through the not stuffed end and out the other end will be the smell of fabric softner. A spiff is typically used for smoking herb in ur house without the parents finding out. :
Yo, pass me that spiff man, I dont want my parents to smell this shit.
by Amanda Lu May 13, 2007
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That's spiff, fork you.
by bread infection November 23, 2009
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the root of such words as spiffy and spiiferific (although the latter is a compound word including terrific). Used mainly as an expletive in much the same was as fuck although can be used as a remark of amazement, shock or suprise.
Boss: "You are going to have to work overtime."
Worker: "Spiff!"

Grocery Clerk: "You just won the sweepstakes."
Shopper: "Spiff!"
by Anonymous November 8, 2002
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A shortened version of the word spiffing used to express how something is good, cool, fun, nice etc.
"Last night was spiff"
by dark-darkling05 October 15, 2005
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