goyish

"in the manner or style of a non-Jewish person" (JPS), especially something WASPy or "white bread"

ongepotchket

"Excessively and unaesthetically decorated; overly baroque." (Rosten)

overly elaborate, excessively decorated, slapped together senselessly, overdone, tacky, ostentatious, overcomplicated.

shnook

"An incompetent person who is deserving of pity but also likable" (JPS); "A customer easily persuaded, a sucker." (H.L. Mencken, American Language)

yenta

"A scandal spreader, a rumormongerer." (Rosten). Usually applied to women.