greedy guts

noun

(functioning as singular) slang a glutton

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for greedy guts

Historical Examples of greedy guts

In the original, however, the word is piffre, (vulgo) 'greedy-guts.'
The Gaming Table: Its Votaries and Victims
Andrew Steinmetz