a halfwit person that often comes out with baffling and retarded comments. They can be very gullible and often take a liking to such music as Dubstep and Drum & Bass. There have been reported cases of some having negative IQ's due to the Kraus algorithm multiplier, in general greebos are alternative people who just want to be treated fairly.
"Mum that greebo just shat on our doorstep"
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