As day brake, butter brake.
"Spoken when a person or thing that was wanting comes opportunely."—Kelly.
A seven years' maiden is aye at the slight.
As fain as a fool o' a fair day.
A's fair at the ba'.
"All's fair in war."—English.
As fause as Waghorn.
"Waghorn, a fabulous personage, who, being a liar nineteen times greater than the devil, was crowned King of liars."—Jamieson.
A's fine that's fit.
A's fish that comes to the net.