Entry 1 sense Webster, 1913 Sleazy /(slē"zy̆)/ · Slea·zy · IPA /ˈsliː.zi/ 01 a. Lacking firmness of texture or substance; thin; flimsy; as, sleazy silk or muslin. 1. Lacking firmness of texture or substance; thin; flimsy; as, sleazy silk or muslin.