Snicker

·noun A half suppressed, broken laugh.

II. Snicker ·vi To laugh slyly; to laugh in one's sleeve.

III. Snicker ·vi To laugh with audible catches of voice, as when persons attempt to suppress loud laughter.

snicker
A glandered horse. to snicker or to snigger To laugh privately, or in one's sleeve. ...

Dictionary of The Vulgar Tongue by Francis Grose
to snicker
To laugh slily, wantonly, or contemptuously; to laugh in one's sleeve.--Johnson. Then I heard the g...

Dictionary of American Words And Phrases by John Russell Bartlett.