Top Definition
The usually involuntary act of clenching the anus while in the middle of passing a bowel moving. This generally leads to a messy situation.
I've been smishing a lot late, it's a good thing I bought stock in Charmin!
by snugw0w April 16, 2009
An illogical Action.

When a persons actions go beyond logical thought processes
If someone is trying to cook an egg in a cold frying pan then they are smishing because it is illogical to cooking in a cold pan
by nomeD08 June 13, 2009

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