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
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
1. plain, open and direct

2. at full speed

3. total, complete
He just farted in my face, flat-out.
by The Return of Light Joker September 17, 2007
Straight up
Rebecca says I really like your red shirt. Theresa says flat out. Rebecca says: straight up!
by T June 11, 2004
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
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
To be extremely busy.
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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