Playing house

To get married to your significant other, reference:
when children would pretend to be married and play in their doll houses referred to as "playing house".

"hey katie I just got this new barbie doll house!"
"really jessie?!? i just got this new ken doll!"
"let's get married and play house with them!"
mother walks in
"what are you kids doing?"
"were Playing house"

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