be laughing up sleeve

be laughing up your sleeve

to laugh at someone secretly, often in an unkind way (often + at ) He persuaded people to believe in him and all the time he was laughing up his sleeve at them.

Common Names:

Name	Pronounced	Usage
Bethuel	bə-THYOO-əl (English)	Biblical
Marijana	-	Croatian, Serbian, Slovene, Macedonian
Zvjezdana	ZVYEZ-dah-nah	Croatian
Elton	['eltən]
Siavash	-	Persian, Persian Mythology
Judocus	-	Dutch (Archaic), Ancient Celtic (Latinized)