toughie

US /ˈtʌf.i/
UK /ˈtʌf.i/
"toughie" picture
1.

a difficult problem or question

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That math problem was a real toughie.
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The last question on the exam was a toughie.
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dilemmaconundrumposerhead-scratcherpuzzle
2.

a strong, resilient, or aggressive person

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He's a real toughie, always standing up for himself.
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Despite her small size, she's a little toughie on the soccer field.
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hard nutstrongmanfightersurvivorstalwart