This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 扚 is uncertain. It visually combines 扌 (hand) and 勺, but the original semantic and phonetic roles are unclear.
The hand radical 扌 beside 勺 suggests an action involving a ladle or scoop, but the exact meaning is unclear.
For チョウ, imagine a hand quickly striking a small ladle, making a sharp 'chou' sound: Chou -> チョウ.