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flat-out: an adverb that means: at full capacity, at maximum speed, totally, thoroughgoing
Ben, pumps working flat-out. A foot of water in the bilge.

a flat-out promotional campaign
a flat-out deception.
by leocod September 20, 2007
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A young man or woman who is dressed nicely and expensively.
I saw Big Flock today and he was flat out with his denim killers and gucci shirt.
by call me ave April 06, 2016
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Rebecca says I really like your red shirt. Theresa says flat out. Rebecca says: straight up!
by T June 11, 2004
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Adj
1. Someone who can can dress; fresh
2. Something that is highly acceptable
Are those the seven jeans with the dolce and gabana hoodie? Son you are flat out.
by Mello F October 22, 2007
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when youve smoked an immense amount of weed or drank loads of alchohol and your on ure back
guy 1: dude wot u doin
guy 2: not alot up im flat out on the floor
by wubadoo December 28, 2005
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Jane: It's lunch time. You want to go grab a bite to eat?

Kate: Thanks, but I can't right now - I'm flat out...
by g_pi July 26, 2005
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