A happy fat person.
Dawn French is a 'flumptuous' lady. She's very happy and large.
by Bella is The Best July 30, 2012
(adjective) to act like a flirty flamingo, usually accompanied with flamingo mating calls
Nick was just shocked on his birthday by that FLUMPTUOUS guy.

"Travis you are acting quite FLUMPTUOUS today!" Liz exclaimed.
by flumptuous liz<3 September 19, 2010

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