Dye is a
colour applied to hair or fabric.
Wool, as
you no doubt know, is the hair of a sheep used to make clothing.
Are we
getting any closer to meaning of this idiom?
Probably
not!
Somebody
who is dyed in the wool is uncompromising with fixed opinions that they will
not change.
For example
he’s a dyed in the wool conservative or a dyed in the wool Manchester United
fan.
Are you
dyed in the wool?
Want to dye some wool? Here's how!