Top definition
A big fat, smelly penis, even cancerous or diseased etc
"The guy's a sad act, he whipped out his Malignant Monster on me again, this time it was dripping with smeg!!?"
by BorrisDancer September 21, 2008
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2
Kick Ass Metal Band From Perth, in Western Australia.
"I saw malignant monster last night. They we're so fkn Heavy."
by JarodC April 01, 2007
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