Definition of as stiff as a board
- The paintbrush was as stiff as a board.
: not easily bent : rigid
: lacking in suppleness or flexibility
: impeded in movement
: in a stiff manner : stiffly
: to an extreme degree : severely
: close enough to the hole for an easy putt in golf
: vagrant, tramp
: a member of the working class
: to refuse to pay or tip
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