Where it comes from
The excerpts show it spreading through later episodes.
How the hosts use it
Ep. 109 has a listener who watched a movie on opening day 'for that quump bump'. The excerpts treat it as a joke term for the audience's real effect on views.
Why fans love it
Gleeful portmanteau silliness. The word is lumpy and sounds like a small, ridiculous bump.
Written by the AI from the transcripts. Every sentence was checked against them, one by one (the full episode transcript wherever a sentence names one); 8 sentences that failed the check are left out. How the check works.