From The Collaborative International Dictionary of English v.0.48 [gcide]:
Overgorge \O`ver*gorge"\, v. t.
To gorge to excess.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
overgorge
v 1: overeat or eat immodestly; make a pig of oneself; "She
stuffed herself at the dinner"; "The kids binged on ice
cream" [syn: gorge, ingurgitate, overindulge, glut,
englut, stuff, engorge, overgorge, overeat,
gormandize, gormandise, gourmandize, binge, {pig
out}, satiate, scarf out]