leg shaking; foot tapping; fidgeting legs
Refers to the habitual, often unconscious shaking or tapping of one's legs, similar to 貧乏ゆすり. The term uses 揺るぎ (ゆるぎ), a voiced variant of 揺すり (ゆすり).
See also: 貧乏ゆすり
During the meeting, his leg shaking bothered me and I couldn't concentrate.
very slight movement
Archaic usage, found in the set phrase 貧乏揺るぎもしない (not even a slight movement). Not used in modern Japanese outside this expression.
See also: 貧乏揺るぎもしない
In old texts, the phrase 貧乏揺るぎもしない was used to describe not moving even slightly.