Top Definition
the proccess of one person asking for gum and then more people want fum until you are out of gum
jack: hey do you want a peice of gum?
jill: sure
random person: hey can i have one:
another random person: can i have one.

10 mins later...
jill: wll thats what happens with the gum effect.
by learteskillshamlet June 27, 2010

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