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to have somebody or something up one's sleeve
01
to have a hidden resource, plan, or advantage that can be used strategically when needed
Collocation
例
Darren Kinder has a couple aces up his sleeve this week.
During the trial, the lawyer had a surprise witness up her sleeve to strengthen the case.
They usually have aces up their sleeves when they negotiate an important transaction.
During the tough contract negotiations, she had an experienced lawyer up her sleeve, ready to step in if the situation got tricky.
In a game of chess, he kept a brilliant move up his sleeve to surprise his opponent.
