빵 터졌어. (I burst out laughing.)

'빵 터지다.'

means 'loudly laugh out of nowhere because something or someone is so funny'.

It's very similar to 'burst out laughing'.

You may know 빵 which means 'bread', but

the homophone 빵 is 'a word imitating the sound made when something like a balloon or a bomb explodes suddenly'.

터지다 basically means that 'something that is surrounded and blocked by something else is broken down or pierced'.

It can also mean 'something like applause, laughter, a cry or a noise suddenly comes out at once'.

So 터지다 can be used for laughter(웃음), a cry(울음) and applause(박수).

웃음이 터지다.

울음이 터지다.

박수가 터지다.

'빵 터지다' only means 'burst out laughing'.

For example,

"어제 이거 때문에 빵 터졌어.(I burst out laughing because of this yesterday.)"

Mount Word