Top Definition
Stands for "Please Reply With Haste"
Something usually added to the ends of important emails or letters.
Dear Mrs Norris,
We've found a box that may belong to you. However, due to a mistake in booking, the box is being forwarded to London. PRWH if the box is yours.
Sincerely,
The Post Office
by AnkhianMorePork February 29, 2012

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