It's always "plumb tuckered” or "tuckered out.” The etymology buffs tell us that "tuck” came from a Greek word meaning "to tug.” In England, it came to mean "to reproach,” and later to sew cloth into folds and pleats.

Where did the term plumb tuckered out come from?

When you are plumb tuckered out, plumb is used as an intensifier, and tuckered out has been around in American vernacular since at least 1839, when the phrase was published in a newspaper — the Wisconsin Enquirer — “I reckoned to have got to the tavern by sundown, but I haven't, as I'm prodigiously tuckered out.”

What does the expression plumb tuckered out mean?

Definition: Completely exhausted; very tired.