Noun:
When the water trap beneath a shower or bath becomes clogged up with a build up of matted rotting hair, skin cells, palm oil, and various bodily secretions. That's a Johnson reservoir.
Johnson reservoir: Oh man, my shower was draining really slowly today, so I had to partially dismantle the piping to clear the blockage. Turns out I had a Johnson reservouir under there!!
by Greased ferret March 4, 2023
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