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Nothing exciting; not good or bad. Often an expression used when something good offsets something bad, and you come out even, i.e. in card games where the points for a hand may split evenly.
How was your day?

Eh, you know, kiss your sister. A little up, a little down.
by bc73 December 13, 2010
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I just cleaned the shower, so don't kiss your sister!

no more kissing my sister, you.
(laughs) What? Huh? Hmm? Um, that's an expression for peeing in the shower.
I'm not gonna pee in the shower anymore.
Why? Why doesn't he get to do that? Yeah.
Yeah, that's true.
Why can't I? And why bring it up now? It goes right down the drain.
You know what? Let's all kiss our sister.
by Bexar86 May 12, 2015
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