laugh in (one's) sleeve(redirected from laughing in their sleeves)
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laugh in (one's) sleeve
To rejoice or be amused secretly and/or contemptuously, as at another's mistakes or misfortunes. Though feigning sympathy, my colleagues are all laughing in their sleeves at me for being stood up at the altar by my fiancée. I know it's mean-spirited, but I can't help but laugh in my sleeve when I see someone slip on the icy streets.