The meaning of the idiom “Laugh in one’s sleeves” is:

The idiom “laugh in one’s sleeves” means to laugh secretly or inwardly, often in a way that conceals amusement from others. It originates from the idea of hiding laughter in one’s clothing, implying a private or sly reaction. This phrase is used when someone finds something amusing but does not show it openly, perhaps to avoid offending others. Options A (laughing loudly), C (laughing openly), and D (laughing nervously) do not capture the subtle, hidden nature of the idiom, making B the correct choice.