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1.
large or oversized body part that leads to awkwardness or clumsiness
"His feet were big and gompy"

"She had huge, gompy hands, not fit for quilting"
by LuLu-U February 24, 2006
 
2.
ADJ. to be decadent, flavorful, overflowing.
This hot fudge sundae is a very gompy dessert.
by S Cier May 04, 2004