The Collaborative International Dictionary of English v.0.48:

Ungallant \Ungallant\
   See gallant.

WordNet (r) 3.0 (2006):

ungallant
    adj 1: offensively discourteous [syn: caddish, unchivalrous,
           ungallant]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "ungallant":
   discourteous, disrespectful, gritless, gutless, heartless,
   impolite, inaffable, insolent, pluckless, rude, spiritless,
   spunkless, unaccommodating, uncivil, uncomplaisant, uncourageous,
   uncourteous, uncourtly, undaring, ungracious, unheroic, unintrepid,
   unpolite, unsoldierlike, unsoldierly, unvaliant, unvalorous