This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
噡 combines 口 (mouth) with 詹, which likely contributes the sound. The exact historical development is uncertain.
With 口 (mouth) on the left, 噡 likely relates to speech or sound. The right side 詹 may hint at the sound, but the overall meaning is unclear.
For トウ, imagine a toe tapping impatiently while someone chatters noisily: toe -> トウ, and the mouth 口 keeps moving.