keel over

listen to the pronunciation of keel over
English - English
To collapse in a faint; to black out; to die

We should all go inside, before somebody keels over from the heat.

Of a vessel: to roll so far on its side that it cannot recover; to capsize
turn over and fall; "the man had a heart attck and keeled over"
turn over and fall; "the man had a heart attck and keeled over
If someone keels over, they collapse because they are tired or ill. He then keeled over and fell flat on his back
turn over; be turned over; faint, pass out
keel over
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