From WordNet (r) 3.0 (2006):
prim
adj 1: affectedly dainty or refined [syn: dainty, mincing,
niminy-piminy, prim, twee]
2: exaggeratedly proper; "my straitlaced Aunt Anna doesn't
approve of my miniskirts" [syn: priggish, prim, prissy,
prudish, puritanical, square-toed, straitlaced,
strait-laced, straightlaced, straight-laced, tight-
laced, victorian]
v 1: assume a prim appearance; "They mince and prim"
2: contract one's lips; "She primmed her lips after every bite
of food"
3: dress primly [syn: prim, prim up, prim out]