When in desperation to hide an erect penis, a person, tucks it up through their pants so that the head is resting on said persons stomach. However the aforementioned person’s shirt does not cover the head. Letting it stick out of the pants like a joey in a mother kangaroos pouch.
Ron: so Harry was trying to hide his wand in class so he tucked it up in his robe but you could totally see the tip.

Hermione: ewe you mean like the Kangaroo Manuver
by TyBunk November 1, 2010
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