Meaning of the word "pop the question" in English

What does "pop the question" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

pop the question

US /pɑp ðə ˈkwɛs.tʃən/
UK /pɒp ðə ˈkwɛs.tʃən/
"pop the question" picture

Idiom

to ask someone to marry you

Example:
He finally decided to pop the question after five years of dating.
I wonder when he's going to pop the question.