Definition - a small amount
This word for a small amount has a large number of variants; we list smidgeon, smidgin, and smidge. There are numerous others, now mostly obscured by the passage of time, such as smitchen, smidging, and smidgion. In use since the middle of the 19th century, smidgen is thought to be an alteration of the English dialect word smitch, meaning “a soiling mark or trace, a smudge.”
Just when the ladies were about to be September Morned, fashion decreed that they should wear just a wee smidgen more clothes.
— _The Dothan Eagle (Dothan, AL), 9 Sept. 1916