drunk, completely shitfaced
Attending to drunk people is no fun at all. The only time it's fun is if you're equally as spiffed as your friend.
by cree January 1, 2004
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another way of saying spiffy or nifty...an expression of happiness...originated from new england
"That new skirt is SO SPIF!"

"I aced my math quiz! spif!"
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Old english word, used by Upper Classes (Private school types, Rugby Players, heirs etc.) to describe something or someone who absolutely brilliant cannot be exceeded.
"Hugos a jolly good shot!"
"Yes! That old chap is spiffing with a shotgun"
by Flossyyyy July 29, 2015
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Spiffing, or to spiff is to have sexual intercourse with your partner/person and leave either the person, or area in a mess.
Wow this room is a mess, somebody must have been spiffing!
by brokenvanity August 17, 2010
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