Derived from the word wallop, which is onomatopoeia (a sound word) for an impact of some sort, it is a Scottish slang term for a penis, usually a large penis.
It is also used to refer to unpleasant people, much like dick, cock, prick and knob would be used in conversation.
"Jesus Christ, did ye see the size of that walloper he had on him?"
If you see a street villian with a pink bandana around his face, chances are somebody has or is about to recieve a walloping.
By Sidoney
Wallops
IRC command. Along with /operwall, /wallops (message) sends a message to all operators on IRC.
They were originally publically visible and intended to be used for disaster announcements and the like, but have been abused to the point where now they are operator only.
pseudo-violently high-powered action performed abruptly.
With one big wallop, the Gremlin's hairy bicep powered a fling that sent the record-breaking pumpkin onto it's endoatmospheric trajectory across the province.
