the true Scottish slang meaning of the word is Idiot.
"This jolly walloper tis a bit daft more than the others."
by Cajin_Asian February 27, 2017
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To be absolutley blind drunk. Hammerd. Legless.
Si and Little BR went to the match and got that drunk they missed it.

Joey - how was the match si??

Si - we didnt go! I had to take BR back to that moody bed n breakfast coz he was wallopped!

Joey - seen.
by pesci January 07, 2014
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Sydney Australia slang for a police officer. Based upon the belief that police are inherently violent, and therefore if they speak to you then you are likely to be walloped (beaten, assaulted).
I saw the wallopers patrolling past my house but they didn't stop, so someone else must be in line for a beating tonight.
by House Martin February 18, 2013
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pseudo-violently high-powered action performed abruptly.
1 The Gremlin swung the Blue Whale into the Cast-Iron Bozo's face with such a wallop that CSB's bright crimson nose popped out from the back of CSB's noggin and plopped to the pavement.

2 Using the strength of just one hairy bicep, the Gremlin walloped the Record-Breaking Pumpkin, batting it onto its endoatmospheric trajectory across the province.
by hahh? November 17, 2003
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When a female gets water in her vagina by taking a shower and masturbating, shoving it down herself, etc and after that quifs and the water shoots out.
"Oh shit, i just walloped all over the carpet"

"Ah, you walloped on me!"
by jammnz April 18, 2006
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