It's the laird's commands, an' the loon maun loup.
Orders from those in authority, no matter how ridiculous or unreasonable, must be obeyed. "There's nae bailie-courts among them.... But it's just the laird's command, and the loon maun loup; and the never anither law hae they but the length o' their dirks."—Rob Roy.
It's the life o' an auld hat to be weel cocket.
It's the wanton steed that scaurs at the windlestrae.
"Ghaist! my certie, I shall ghaist them—if they had their heads as muckle on their wark as on their daffing they wad play na sic pliskies—it's the wanton steed that scaurs at the windlestrae. Ghaists! wha e'er heard of ghaists in an honest house!"—St Ronan's Well.
It's the waur o' the wear.
It's time enough to mak my bed when I'm gaun to lie down.
It's time enough to skreigh when ye're strucken.
It's weak i' the wow, like Barr's cat.
It's weel that our fauts are no written in our face.