Top definition
Someone who is not easily disturbed or deterred, and will typically excel under pressure/have calmness in a crisis.
The college scout knew she was unflappable when she kept her composure, and lead the team to victory in the final seconds of the big game.
by PRLB July 22, 2016
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2
Dave Flournoy.
I hit Dave Flournoy, and he kept singing to the birds. They flapped away, but he was unflappable.
by sinking_ship March 06, 2017
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