1 definition by Steven J. Gould

Top Definition
Noun. The act of masturbation performed in a work-like environment. A waller will usually take place on a break to pass the time in an otherwise uninteresting day; the prospect of getting caught, coupled with a possible lack of sexual stimulus (depending on your job) make for a challenging yet satisfying activity.
"I heard Jacob had a waller in the WHSmiths toilets."
by Steven J. Gould September 06, 2012

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