(1) Dress very carefully and in a finicky manner
(2) Put on special clothes to appear particularly appealing and attractive
(1) You heard the Postmaster was here and so you must prink and prim yourself in front of the mirror - look on this side and that side and all around.
dress up
tog up
rig out
trick out
tog out
fancy up
gussy up
get up
trick up
fig up
overdress
fig out
deck out
attire
Dress down