To laugh in one's sleeve.

I will wear my heart upon my sleeve
For daws to peck at;
I am not what I am. [ William Shakespeare ]

Every one hath a fool in his sleeve. [ English Proverb, collected by George Herbert ]

I will fasten on this sleeve of thine;
Thou art an elm, my husband, I, a vine. [ William Shakespeare ]

To laugh inwardly, (i.e. in one's sleeve).

He pins his faith upon another man's sleeve. [ Proverb ]

Put your hand no farther than your sleeve will reach. [ Proverb ]

He gave him a thing of nothing to hang upon his sleeve. [ Proverb ]

That sick man is not to be pitied who hath his cure in his sleeve. [ Proverb ]

The friar preached against stealing, and had a goose in his sleeve. [ English Proverb, collected by George Herbert ]

The friar preached against theft, when he had a goose in his sleeve. [ Proverb ]

A beau is one who arranges his curled locks gracefully, who ever smells of balm, and cinnamon; who hums the songs of the Nile, and Cadiz; who throws his sleek arms into various attitudes; who idles away the whole day among the chairs of the ladies and is ever whispering into some one's ear; who reads little billets-doux from this quarter and that, and writes them in return; who avoids ruffling his dress by contact with his neighbors sleeve, who knows with whom everybody is in love; who flutters from feast to feast, who can recount exactly the pedigree of Hirpinus. What do you tell me? is this a beau, Cotilus? Then a beau, Cotilus, is a very trifling thing. [ Martial ]