poor preparation; inadequate arrangements
Refers to insufficient planning or clumsy handling of practical matters, often implying a lack of foresight or organizational skill. Used as a noun or adjectival noun (na-adjective).
The meeting was chaotic due to poor preparation.
Everyone was troubled by his poorly arranged response.
準備不足 is a straightforward statement of insufficient preparation, whereas 不手回し carries a nuance of clumsy or inept handling.
Compound of 不 (fu, 'not') + 手回し (temawashi, 'arrangements, preparations'). The exact historical derivation is uncertain, but the word is conventionally associated with the idea of poor or clumsy handling of affairs.