flat on one's back

idiom

Definition of flat on one's back 

: lying with one's back against the ground, on a bed, etc. The accident left him (lying) flat on his back (in bed) for two weeks. This phrase is sometimes used figuratively. The stock market has been flat on its back.

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Dictionary Entries near flat on one's back

flatlock

flat machine

flatmate

flat on one's back

flat out

flat-out

flat-panel

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