(idiomatic) To know all there is to be known about a certain discipline.

Having gotten a good start; having reached a level of stability or self-sufficiency.

(idiomatic) Six strokes with a cane, a traditional school punishment.

(idiomatic, informal) To accept some chore, hardship or punishment for the sake of one's friends or colleagues.

(idiomatic, vulgar) To take a big risk.

Alternative spelling of under the table; in attributive use.

(humorous, euphemistic) Lacking in intelligence; dimwitted.

(idiomatic) To get things done.

(periphrasis) Japan (a country in Asia)

Used other than figuratively or idiomatically: see boots, on, ground.