Top Definition
Acronym and internet shorthand for the phrase "more power to you."

Meaning just that, this is a generally sincere and UNironic expression of support or good will, usually with regard to a specific action or belief.

It is important to note that the speaker does not necessarily need to agree; it is a recognition of well-intended effort, the support of which most tolerant minds can handle.
1. "A: okyz imma ban that n00b
B: mpty"

2. "A: i've been singing in this folk band these days. i really think i've come into my own.
B: folk is wack but mpty. be urself."
by grillcover August 04, 2008

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