This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
饙 combines the food radical 飠 with the phonetic component 賁. The exact historical development is uncertain.
The food radical 飠 suggests something related to eating or cooking, but the exact meaning is unclear.
For フン, imagine a fun cooking scene where the food radical 飠 is combined with 賁: fun -> フン, though the kanji's meaning is uncertain.