Meaning of the word "the bread always falls buttered side down" in English

What does "the bread always falls buttered side down" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

the bread always falls buttered side down

US /ðə bred ˈɔːl.weɪz fɔːlz ˈbʌt.ərd saɪd daʊn/
UK /ðə bred ˈɔːl.weɪz fɔːlz ˈbʌt.əd saɪd daʊn/
"the bread always falls buttered side down" picture

Idiom

used to say that when something goes wrong, it tends to happen in the worst possible way

Example:
I dropped my toast and of course the bread always falls buttered side down.
It's just my luck; the bread always falls buttered side down for me.