Depicting a「doorway」that must be spread apart before any sort of use, with「no-longer-integrated feet in training」that is suggestive of OPENING UP A SLIDING DOOR while kneeling on the floor and not while standing (folks with newly-no-longer-integrated feet did not stand much), the polite manner of opening doors in Asia…in the old days, doors in Asia were not hinged, but instead slid back and forth within grooved tracks. When too much force is applied to the sliding door, a loud SMACK or SLAPPING sound is audible as it strikes the wood of an adjacent post.
　HANDHELD FANS also open and close by sliding the slats of the fan back and forth and then using it to create a breeze. Furthermore, while a handful of「feathers」in a fan shape may have provided all sorts of pleasant stimulation and fun with a「buttocks crack」feathers in a fan shape do not produce much actual breeze, other than when attached to birds.
　「Doorway of two no-longer-integrated feet」resembling HINGED and FLAPPABLE「chick's wings」also must be SPREAD TO OPEN them and then enveloped around a client's appendage spewing venom before commencing SLIDING MOTIONS during use by shuttling back and forth within the grooved track therein…PLUME of course can refer not only to large feathers but to an arching discharge or ejaculation, such as a 'plume of smoke' or, a 'plume of effluent' as sewage pollutes a body of water. SLAP may have related to what was needed to facilitate cooperation to OPEN UP AND SPREAD WIDE a「buttocks crack doorway」or the SLAPPING sounds of rhythmical contact from a FANNING action, describing clearly the motions made by a client with a no-longer-integrated foot, or two, or a buttocks, and so on. Buttocks and the female genitals are also called a「fanny」in English as well…both must be spread open prior to use. The term「fanny」as an English reference to either the buttocks (American) or the vulva (British) underscores similar traits and appearance…both references may have originated with this Chinese glyph.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: fan; sliding, hinged or detachable flat part of something; classifier for doors, windows etc; to fan; to slap sb on the face
Japanese: folding fan, to fan, to incite, to instigate
Unihan extended: fan; door panel
EDRDG: fan; folding fan

Used within names (nanori)
おう　･　おおぎ