Would it be weird to call my girlfriend "MOTHER"?

Slang definition: "someone is “mother” if they're an iconic feminine figure, and an act is “mother” if it contributes to that icon status. It's most often used to refer to pop stars, actresses, or other celebrities, but it can be applied in everyday life, too."

She already referred to herself as it.

Would it be weird to call my girlfriend "MOTHER"?
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