laugh up (one's) sleeve

To try to hide that one is laughing at someone else. Ron may seem like a nice guy, but he laughs up his sleeve whenever he's around someone he dislikes. The popular kids laugh up their sleeves every time I walk by—it's so infuriating.

Common Names:

Name	Pronounced	Usage
Bakir	-	Bosnian
Yuri (1)	YOO-ree (Russian)	Russian, Ukrainian
Ib	-	Danish
Zoe	ZO-ee (English), DZO-e (Italian)	English, Greek, Italian, Ancient Greek
Dagm&Aelig;R	-	Ancient Scandinavian
Simion	-	Romanian