It means a person who is dishonest or a cheat, and could, therefore be applied to many politicians.
Don’t trust that bastard he’s a rip off artist, he’s a right nickum.
by AKACroatalin March 7, 2019
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someone who doesn't know what their talking about
"Tomorrow's Friday right?"
"No, you nickum, tomorrow's Thursday"
by smartie111 September 16, 2019
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