Climbing Mount Improbable is best described in the Hymn to Evolution by C.S. Lewis:

Lead us, Evolution, lead us

Up the future's endless stair:

Chop us, change us, prod us, weed us.

For stagnation is despair:

Groping, guessing, yet progressing,

Lead us nobody knows where.

Wrong or justice in the present,

Joy or sorrow, what are they

While there's always jam to-morrow,

While we tread the onward way?

Never knowing where we're going,

We can never go astray.
Never knowing where we're going, we can never go astray pretty much sums up the whole concept of Climbing Mount Improbable.
by annelisefrench September 22, 2010
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An attractive, athletic guy who gossip, hasn't drank alcohol or done drugs, is waiting till marriage, and is both extremely kind and empathetic.
Stacy: I'm just looking for a genuine guy who isn't superficial, likes me for my personality, is reserved and is hot
Jenny: You're looking for an improbability
by ZEutect September 8, 2021
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When you have that one piece of shit is wedged in your asshole and won't drop out. Thinking you are done and you wipe over and over but the damn thing is just marking up your toilet paper like a melting crayon.
I went through twelve feet of toilet paper to wipe off the improbable dollop but it would not diminish in consistency.
by ThatWVGuy August 21, 2017
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