(Scots) Flaky. Crumbly, not in a good way...Resembling a crushed biscuit. Can be used to describe physical appearance or state of mind (see below)
I've just had my roots done, the dafty used too much peroxide and my head is all biscuity arsed.

Waaaaay too much cider last night, I am feeling all biscuity arsed, won't be moving from the couch all day.

No need to get all biscuity arsed with me!
by K.Bab December 26, 2016
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