sidle/ˈsaɪdl/EtymologyVariant of Siddall.nameA surname.nounAn act of sidling.; A sideways movement.“[I]n this mythic America, we fly along in the fast lane, placing bets against flashing lights in the rearview mirror, against the dreaded sidle into the gravel and the voice at the window demanding our license.”An act of sidling.; A furtive advance.“Listener up there! Here you … what have you to confide in me? / Look in my face while I snuff the sidle of evening, / Talk honestly, for no one else hears you, and I stay only a minute longer.”verbTo (cause something to) move sideways.“[F]rom the circle of delighted auditors listening to the gentillesses of the pink cockatoo, who was sidling on his stand in the sunshine, a whole party of the Beresfords caught sight of me, and in a minute I was surrounded; [...]”In the intransitive sense often followed by up: to (cause something to) advance in a coy, furtive, or unobtrusive manner.“There was one little prim old lady, of very smiling and good-humoured appearance, who came sidling up to me from the end of a long passage, [...]”