verb

• (transitive, Scotland, Geordie, Northern England) To worry; to bother, annoy.
  ""I wouldn't fash masel' about them, miss. Them things be all wore out.""
• (intransitive, Scotland, Geordie, Northern England) To trouble oneself; to take pains.
  "“They,” said he, meaning the collops, “are such as I gave his Royal Highness in this very house; bating the lemon juice, for at that time we were glad to get the meat and never fashed for kitchen. Indeed, there were mair dragoons than lemons in my country in the year forty-six.”"
• (Nigeria, slang) To ignore or forget about someone or something.

noun

• (Scotland, Geordie, Northern England) A worry; trouble; bother.

noun

• (slang, derogatory, especially UK) A fascist, a member of the far-right.
  "The Butchers Here is an old Munich policeman — Wilhelm Frick with eyes like those of a fash."
• (slang, derogatory, in the plural, especially UK) The far-right, especially violent far-right demonstrators, collectively.
  "Used to go down to London on bash-the-fash awaydays; turn up at National Front marches and give them a toeing."

verb

• (slang) To make something fascist.