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1.
The muggy and smelly result of the bathroom when you have completed taking a steaming hot shower after you have taken a massive dump.
Don't go into the bathroom, it's like a Tijuana sauna
by Roy Folker July 30, 2010
 
2.
the act of holding the window lock down as you fart in an enclosed automobile with the heat on.
i totally pulled a tijuana sauna with my old lady in the car, it was viscious
by k dawg 41 September 24, 2007
 
3.
An outhouse or porta-potty which has been overused on a hot summer day.
I gotta take a shit, but I don't want to use that Tijuana sauna
by KiLLeRfriend October 02, 2009