Alternative spelling of schoolmate

(dated or US) It doesn't matter, it's unimportant, it doesn't make any difference.

Irrespective of, regardless of, in spite of.

(followed by a phrase) Regardless, in spite of. / (not followed by a phrase) Regardless of any or most possible adverse circumstances.

it is not important; do not fret (used to reassure or comfort the person to whom it is said) / I withdraw my previous statement (often used if it wasn't heard or understood).

(computer hardware) Any form of persistent data storage technology with high capacity relative to that of the high-speed non-persistent memory of computers of its time.

Used other than figuratively or idiomatically: Manufactured in Japan. / (idiomatic, dated) Cheaply manufactured; of poor or low quality, especially if made in East Asia.

Alternative spelling of cat in the meal-tub

(idiomatic) Something concealed; a hidden danger.

An exercise machine whose action resembles that of rowing a boat.