With all one's might; to the fullest; as much as possible.

maximal, possessing all one's might

the fullest extent; the limit (of one's power, etc.)

(typography) each mark of the pairs of iteration marks ゝ/ゞ and ヽ/ヾ, respectively used to repeat 清音 (seion)/濁音 (dakuon) hiragana and katakana

Have a nice day!

the same criminal

one for all, all for one

(literally) plan your day during the morning, plan your year during New Year's / early planning is the key to success

kill two birds with one stone, do one task and finish two or more goals (literally, “one stone, two birds”)

(obsolete) being surprised twice / (obsolete) more specifically, describes the appearance of a woman who has a beautiful figure from behind but has an ugly face