Top Definition
The wind-chill factor that one calculates at night as they ride the trolley down to the BART station in San Francisco. People who usually do this are brave for enduring such temperatures and like to place their cold fingers on your neck.
(On the Trolley)
E: Hey, do you want to sit down.

R: No it's ok, I'll just stand.

E: Okay, while you're out there can you calculate the Trolley Wind Chill Factor for me??

R: (stink eye)
by candycrazee October 14, 2011

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