не до смеху — past laughter
поднимать кого-л. на смех — to make a laughing-stock of smb., to make fun of smb.
смеха ради — in jest, for sheer fun, for joke, just for fun
со смеху — with laughter
и смех и грех — you don't know whether to laugh or cry
как будто на смех, словно на смех, точно на смех — as if out of spite, as if to mock smb.
покатиться со смеху — to roll / rock with laughter
умирать / подыхать со смеху, от смеху — to die laughing