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When something gives way or breaks due to a sudden increase in weight that was put upon it.
Wow! She really fatassed that beach chair! We had to throw it away!
by sporto March 28, 2006
verb, past tense

to waste time, to do nothing for a long period of time. the act of being a fatass.
Ryan: Wow I haven't done anything today.
Hannah: Same, I just sat at home and fatassed.
by Hannah412 February 06, 2009