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1.
Phlegm of the anus
I'm not going to eat that, it looks like someone's figgum!
by nbob69 March 28, 2009
 
2.
a person that resembles a fish.
used as a derogatory term to call someone a jackass, douchebag, etc.
you're such a jackass = you're such a figgum
by cfiggum February 20, 2007