ETYMOLOGY
from Scottish gundie (greedy, voracious) + guts
EXAMPLE
“…In short, these quarrels grew up to rooted aversions; they gave one another nick-names: she called him gundy-guts, and he called her lousy Peg, though the girl was a tight clever wench as any was, and through her pale looks you might discern spirit and vivacity, which made her not, indeed, a perfect beauty, but something that was agreeable…”
From: John Bull
By John Arbuthnot, 1712
Lexicophilia 