Someone who fails to do something they were supposed to do. Shanking can be deliberate or accidental, the key aspect is just that they failed to come through on something.

Someone not showing up to their friend's party is just a flake.
But not showing up, and also forgetting they were supposed to bring the tap, that is a shanker.
by mad scientist August 27, 2006
a fat, short, meaty little penis, usualy weilded by obese children.

look at that fat kid's shanker, its so short and fat!

that girl doesnt like me because i have a shanker.

by sausage robino February 17, 2007
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