1) Covert laugh 2) Derisive laugh 3) Disrespectful laugh 4) Half-suppressed laugh 5) Laugh 6) Laugh quietly 7) Laugh snidely 8) Laughter 9) Little laugh 10) Partially stifled laugh 11) Sly laugh 12) Smothered laugh 13) Snide response 14) Snigger 15) Snort 16) Stifled laugh 17) Suppressed laugh 18) Tee-hee 1) Giggle 2) Hollowlaugh 3) Snigger 4) Snort 5) Tee hee 6) Tehee 
• (n.) A half suppressed, broken laugh. • (v. i.) To laugh slyly; to laugh in one`s sleeve. • (v. i.) To laugh with audible catches of voice, as when persons attempt to suppress loud laughter.
Snick'er intransitive verb [ imperfect & past participle Snickered ; present participle & verbal noun Snickering .] [ Confer Dutch snikken to sob, to sigh.] [ Written also snigger .] 1. To laugh slyly; to laugh in o...Snick'er noun A half suppressed, broken laugh. [ Written also snigger .] 
[n] - a disrespectful laugh 2. [v] - laugh quietly
snort 1 snigger noun a disrespectful laugh