What is "fanny about"

alt. 1 (context chiefly British intransitive idiomatic English) To waste time or fool around; to engage in activity which produces little or no accomplishment. 2 (context chiefly British transitive and intransitive idiomatic English) To wander about or prowl around. vb. 1 (context chiefly British intransitive idiomatic English) To waste time or fool around; to engage in activity which produces little or no accomplishment. 2 (context chiefly British transitive and intransitive idiomatic English) To wander about or prowl around.