WordNet (r) 3.0 (2006):

overindulge
    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]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "overindulge":
   carry to excess, carry too far, exaggerate, exhaust, go overboard,
   go the limit, go to extremes, go too far, go whole hog,
   know no bounds, overact, overcarry, overdevelop, overdo, overdrive,
   overeat, overelaborate, overemphasize, overexercise, overexert,
   overexpend, overgorge, overlabor, overplay, overreact, overspend,
   overstrain, overstress, overstudy, overtask, overtax, overtrain,
   overuse, overwork, pass all bounds, protest too much