A phrase used in some parts of Australia by Bogans that watch Rugby League.

example;

a)Hey do you know Souths beat Brisbane?
b)No way! Did they?
a)Of course not.
b) That's a deadset gee up, that'll do me.
by Jango Fett August 6, 2006
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the fact that a retarded person cannot not talk about retarded things
"Man, Sean cannot help but talk about the stupidest shit"
"Yeah bro, that's the Deadset Effect"
by LittleBrav0 January 18, 2022
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