Top Definition
An extremely stinky bathroom- one that smells like an overflowing septic tank is right underneath it. Meth labs generally have several stalls, each of which is equally noxious.
I'll be right back I have to go make a deposit in the methane lab.
The meth lab in the videotpae department where I work smells like its overflowing with 60 years of shit.
by Scott KABC December 15, 2006
7 Words related to methane lab

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