mass quantities, high quality or long period/s of time.
I havn't seen that dame in fer days! i will have to hail her on the sabbath!

Oh, I'm gonna need fer days of bricks! building this chimeny will surely be a task of the harshest kind.

i was eatin' this cookie last wednesday and i was just like "fer daaaaays!"
by p-chyles October 27, 2009
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When one cries and is unable to stop until several days are up. Usually used in a light hearted manner but sometimes used in VERY serious situations like if you just killed someone's dog or a cat just a killed a robin.
Deemen seemen made me cri fer days on end for calling me stooped gurl times
by Indiar January 24, 2019
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