When reading, I met with this expression when MC is cursing someone who tried
to took away his friend (maybe wife in the future^^).

「その汚い顔を洗って、出直してこい！」

I can only understood somewhat of its meaning , like " Go back to elementary
school to learn how to behave, and then come back to talk with me !" but not
sure due to my JP level. Hope someone can give me a correct meaning / or an
equivalent English swearing/ cursing expression.

Context: MC and his friends broke in the royal palace to rescue 1 friend, who
have been captured by a prince, and was forced to become the prince's wife.
After that MC met up with the prince and then said the sentence I've mentioned
above.

Prince「王の命令に背き、私兵を王宮へ乱入させる」

Prince「紛うことなき反逆罪だが……今なら、まだお前を許そう」

Prince「そいつらを帰らせて、俺の妃になれ」

MC's girl「私は……」

MC's Friend 1「お断り！」

MC's girl「え」

Friend 2「お断りだな」

Friend 3「遠慮させてもらう……かな」

MC「……」(silently inhaling in anger^^)

**MC「その汚い顔を洗って、出直してこい！」**
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2022-11-15T04:19:20.650
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2022-11-15T04:19:20.650
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question
meaning expressions reading-comprehension japanese-to-english conversations
How to understand this JP cursing/ swearing expression and its equivalent English meaning ? 「その汚い顔を洗って、出直してこい！」