| 释义 | do something on the slyon the slySecretly; in a clandestine or furtive manner. Even though he said he'd quit smoking, he still kept up the habit on the sly. The senator had been taking bribes from lobbyists on the sly for years before he was caught.See also: on, slydo something on the ˈslydo something secretly: She didn’t seem to have much appetite for dinner. I wonder if she’s been eating chocolates on the sly? OPPOSITE: (out) in(to) the openSee also: on, sly, something |