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When someone in a conversation only sticks to one topic or only talks about what they want. The subject of discussion could change but the person refuses to talk about it.
Person 1: "I was at the work today and....."

Wheelnerd: "SO I WAS ON R/CARS"
Person 1: "Thanks I wasen't talking or anything"
Person 2" "Yet another Wheelnerdism"
via giphy
by Slappy Pickle December 22, 2017
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