1 definition by Niallh55

1) To remove the fun from a situation (especially a competitive game.)

2) Someone who disappears for the night with a member of the opposite sex and then refuses to share the sordid details of the encounter with their friends
1) oh god, he completely cliffied that game of monopoly

2) Come on, what happened last night? Don't be a cliffy
by Niallh55 November 8, 2007
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