your bag.

That is, such a thing is better done or told than you could do it.

That'll be a sap out o' my bicker.

Or will injure me by reducing my income or prospects.

That's abune your thoom.

Spoken to a person who is about to attempt a thing of which he is
considered incapable.

That's a piece a stepmother never gied.

A hearty expression accompanying a substantial "piece" or meal.

That's a sair hair in my neck.

"I canna but think I maun hae made a queer figure without my hat and
my periwig, hanging by the middle like bawdrons, or a cloak flung
ower a cloakpin. Bailie Grahame wad hae an unco hair in my neck an
he got that tale by the end."--_Rob Roy._

That's as ill as the ewes in the yaird and nae dogs to hunt them.

The "yaird" being the safest place where the ewes could be, the
proverb means that a thing is quite right.

That's a tale o' twa drinks.

That's a tee'd ba'.

That's but ae doctor's opinion.

That's equal aqual.

"Mr Novit, ye'll no forget to draw the annual rent that's due on the
yerl's band--if I pay debt to other folk, I think they suld pay it
to me--that equals aquals.--Jock, when ye hae naething else to do,
ye may be aye sticking in a tree; it will be growing, Jock, when
ye're sleeping. My father tauld me sae forty years sin', but I ne'er
fand time to mind him."--_Heart of Midlothian._

That's felling twa dogs wi' ae stane.

That's for that, as butter's for fish.

Meaning that such a thing is exactly what is wanted.

That's for the faither, and no for the son.

"Spoken when a thing is done with slight materials, and,
consequently, will not be lasting."--_Kelly._

That's Halkerston's cow, a' the ither way.

Halkerston, a lawyer and landed proprietor, gave permission to one
of his tenants to graze an ox. The tenant's ox was gored to death by
a heifer belonging to the lawyer. The tenant went to Halkerston, and
told the story the reverse of what had occurred. "Why, then," said
the lawyer, "your ox must go for my heifer--the law provides that."
"No," said the man, "your heifer killed my ox." "Oh," said
Halkerston, "the case alters there," and forthwith reversed his
tactics.

That's ill paid maut siller.

"Metaphorically, a benefit ill requited."--_Jamieson._

That's like seekin' for a needle in a windlin o' strae.

That's my gude that does me gude.