The Collaborative International Dictionary
Fash \Fash\, v. t. [imp. & p. p. Fashed; p. pr. & vb. n. Fashing.] [OF. faschier, F. f?cher, to anger, vex; cf. Pr. fasticar, fastigar, fr. L. fastidium dilike. See Fastidious.] To vex; to tease; to trouble. [Scot.]
Wiktionary
vb. (present participle of fash English)
Usage examples of "fashing".
Stop fashing yourself laddie just do what you've prepared yourself and Nigel and Alana for don't think of the cold world watching with its mechanical moonlet eyes pretend it's the first soul-trip just like long years ago a natural thing if a wonder an old thing cherished in spite of doubts and oppression and now it's time we showed it proudly and how will you like being a famous man my own wee Jamie?
There I was, fashing my poor yeoman over it, until she pointed out I had signed the thing Why, I canna even finish a cup of tea without someone needing me for something.