It started out so well!

When 'Tonight Show' host Jimmy Fallon conscripted guest Ricky Gervais into playing a round of Word Sneak, which requires players to "sneak" offbeat words into everyday conversations without laughing so hard their guts bust, Gervais managed to quite effortlessly insert his first word without too much trouble. Things went downhill from there, quite frankly, and never really recovered.

Which word finally felled Gervais? Something about gerbils? Maybe even Shaquille O'Neal? Nope, you'll never guess -- and you'll never guess how he tries to get out of a situation a giggling Fallon deems "sloppy."

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