(idiomatic) A piece of cake; an extremely simple thing, something trivial, a cinch, easy as pie.

朝飯前: A piece of cake; an extremely simple thing.

(telephony) a common Japanese telephone greeting: hello; used when answering the telephone / used to confirm that the person being addressed is listening, or to confirm if anyone is listening

put away

forget oneself / be beside oneself

(idiomatic) to take on a fight; lit. to buy a fight

buy on credit

stocking up

stock up

(slang) Of an adult, buying (chiefly childish) things in great amounts (due to newfound purchasing power).