Top definition
The act of lowering the window shades so people walking by outside can't see you masturbating.

Has become synonymous with the act of masturbating, to where simply saying you "pulled the shades" means you rubbed one out.
College Guy 1: Hey man, you wanna go get some food?
College Guy 2: I can't right now.
College Guy 1: Why the fuck not?
College Guy 2: Because I'm about to pull the shades, man!!
by Sebastian Haff August 14, 2009
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