A threat used against a person when he or she doesn't show up to meetings. The exact nature of the punishment is left undefined so as to be more intimidating.
Matt is going to to wallbash Pedro if he skips another fraternity chapter meeting.
by Matthew Farrell November 29, 2006
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The act of banging ones head against a wall.

The term wallbash is used in online message boards to express ones frustration with a previous statement. It is used when facepalm is not strong enough to express the level of frustration one feels due to the ridiculous nature of the comment.

Wall bash is most commonly used as BBcode :wallbash:, the result is an animation of a frustrated smilie banging his head against a brick wall.
Are you retarded? :wallbash:

or

The level of ignorance demonstrated in your post is beyond comprehension, wallbash!
by FireDragon7 December 10, 2010
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