Akademik

П-573
ГДЕ НАША HE ПРОПАДАЛА (ГДЕ НАШЕ НЕ ПРОПАДАЛО)! (saying) said when s.o. ( usu. the speaker himself) is about to undertake sth. that either involves risk or is not sensible, well-advised: — I'll take that risk (that chance)! I'll risk it! I've (you've etc ) got nothing to lose what do I (you etc) have to lose! nothing ventured, nothing gained! we (you) only live once (there's) no harm in trying! what the hell!
here goes nothing! "...Почему бы не попотчевать гостя, только тебе, Паша, довольно бы, мне не жалко, да ведь назавтрева ( ungrammat = завтра) опять головой мучиться будешь». - «Ладно, мать, -добродушно отмахнулся тот, - мечи на стол, где наша не пропадала!» (Максимов 1). "There's no reason why I shouldn't get the guest a drink, only you, Pasha, have probably had enough. It's not that I grudge you, but you'll just go around with a sore head tomorrow." "All right, Mother," he shrugged it off good-naturedly, "let's have what we've got on the table. I'll take that chance!" (1a).
(Маша:) Выпью рюмочку винца! Эх ма... где наша не пропадала! (Чехов 5). (М.:) I'll have a little glass of wine. Why not... we only live once! (5a).

Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. . 2004.