Affirmative response to a question implying that the “yes” answer was more or less obvious or just a simple “Sure it’s going to happen, what else would you expect?” Navy slang from the 1950s referring to the “dress blue” flat had enlisted sailors wore at that time.

You going out drinking tonight, Richie? “ “I hope to shit in your flat hat, I am”
by Tony Duhamel October 30, 2007
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Rural Australian slang for
1. laying on one's stomach
2. asleep from being plastered, wasted, etc.
3. Worn out from hard yakka or work
1. The scrum left him flat out like a lizard drinkin.
2. Too much VB and Becky's flat out like a lizard drinkin.
3. *yawn* I'm flat out like a lizard drinkin
by Luke D Lorenz January 22, 2004
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The tone so low that it moves your intestinal valves, thus causing you to shit yourself.
4 million third graders got together in arkansas to play my country tis of thee on recorders and the boys changed the music to the "brown tone" (96 cents below the lowest E flat) and the whole world simultaneously shit themselves.
by south park rules :D December 25, 2009
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To be not busy.

As a visual metaphor, it implies the opposite to the expression ‘flat out’. A lizard drinking is visually flat against the ground, still, stationary, prostrate, prone and apparently inactive - the opposite of what a person is like when they are busy.

The primary definition that I heard for years amongst colleagues and friends fluent in Strine was the 'not busy' version. It was only recently that I have heard it used to mean 'hard at work' or 'busy'. It feels that the traditional components of visual metaphor and humour in the Strine lexicon have been lost or the expression misconstrued at some point.
Flat out like a lizard drinking -

"Man it's quiet here. You busy?"
“Busy? Flat out… like a lizard drinking… hehehe.”
by InterlocutorInThe1st October 27, 2020
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When your lady is on the rag and won’t give you a blowjob to compensate. So you you jerk off using your hand that fell asleep.
Last night , with Cindy, I had a Flat Tire, No Spare, And a Stranger Stopped to Help.
by Caesar The Baby May 24, 2018
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ford bronco on 4 flat tires

When a girl has sex doggy stile while her legs and arms are num
Yo I gave that girl a ford bronco on 4 flat tires.
by Syndrome December 06, 2015
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