spongebags
dress pants
full dress
dress
full-dress
glad rags
fancy dress
drop crotch
togged
trouse
formalwear
raimented
Hammer pants
wrapper
trousies
tailcoat
white tie
pair of trousers
dress suit
tail coat
tails
white tie and tails
eveningwear
habited
habilimented
pantaloon
morning dress
weddingwear
garmented
boiler suit
done up like a dog's dinner
pluderhose
workpants
dress whites
dress blues
dressed-up
dressed to kill
spiffed up
dressed
pleathered
slack suit
spruced up
groomswear
dressed to the nines
dolled up
togged up
kilt
jazz pants
tenue de ville
trews