The Collaborative International Dictionary of English v.0.48:
Frumpish \Frump"ish\, a. 1. Cross-tempered; scornful. [Obs.] [1913 Webster] 2. Old-fashioned, as a woman's dress. [1913 Webster] Our Bell . . . looked very frumpish. --Foote. [1913 Webster]WordNet (r) 3.0 (2006):
frumpish adj 1: primly out of date; "nothing so frumpish as last year's gambling game" [syn: dowdy, frumpy, frumpish]