What is the meaning of Sidle?

To (cause something to) move sideways.

In the intransitive sense often followed by up: to (cause something to) advance in a coy, furtive, or unobtrusive manner.

An act of sidling.

  1. A sideways movement.
  2. A furtive advance.

A sideways movement.

A furtive advance.

locative singular of sidło

Source: wiktionary.org