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If something's terrible or bad or boring or just generally negative, it's 'waning'. Derived from the cycles of the moon. Opposite of waxing
I hate having to eat brussel sprouts at xmas, they're waning!
by SpazOnTheHorizon January 06, 2012
1 3
The act of pleasuring people of considerable age difference to yourself

e.g, I'm gonna go down to the bingo hall tonight and pick up some old ladies: take em for a bit of waning
by chaotica March 22, 2006
16 10