Days past during which no particularly amazing thing happened but which were nevertheless wonderful. These days are indelibly printed in your memory and usually took in place in the summer.
'That was a messenday' or 'Those were messendays'.
The amount of time it would take to get from one place to another, defined in terms of the amount of facial hair that could be grown before you get there.
From legendary Gower surfer, 'Bryn-Dogg.'
'It's about a beard in that direction', or 'Go that way for a beard', or 'It takes about a beard'.