This doesn't literally mean big deal (крепкая сделка), it's the opposite of "no big deal" (неважно). A: I don't think I'm going – it's probably just another boring office party. No big deal. B: Actually, it's a really big deal - it's an awards ceremony and all of management will be there.

Uly, если про сделку, то "крупная сделка")

That was a typo, I was repeating what Al wrote.

I mean не "крепкая", как ты написал, а "крупная"

I see

😜

😉