Wiktionary
vb. (context idiomatic English) To propose marriage.
WordNet
v. ask (someone) to marry you; "he popped the question on Sunday night"; "she proposed marriage to the man she had known for only two months"; "The old bachelor finally declared himself to the young woman" [syn: propose, declare oneself, offer]
Usage examples of "pop the question".
So, Kate didn't need to use old boyfriends or suitors, such as Teddy, to get John to get off his ass and pop the question.
Osnard waits until the pudding to pop the question, then until the Gorgonzola, by which time Pride's patience has evidently run out, for to Osnard's dismay he abandons his monologue on the effect of Inca culture on contemporary Peruvian thought and explodes in ribald laughter.
But that second week in August I took some savings out of the bank, bought an engagement ring, and I was ready to pop the question and bring home my beautiful bride to be.
For her, the suspense that grew throughout dinner didn't have much to do with whether or not Wally would pop the question, because if he didn't broach the subject this time, she intended to take the initiative.
Back then the train route paralleled the Rhine, and Tom had been wondering when would be the best time to pop the question.
The way she treated me last night, I don't suppose I'll even see her again, let alone get the opportunity to pop the question.