bare-butt
bare-arse
bare-bum
kaalgat
butt-naked
stark
scud
in the raw
naked as a jaybird
full monty
bare-bottomed
nakey
savage
bare
unapparelled
bare-assed
buck naked
stark naked
naked as the day one was born
bucket naked
stone naked
clothingless
togless
seminude
nakedish
demiclad
seminaked
skyclad
blake
starkers
bareass
bollocky
skinny
in one's birthday suit
in your birthday suit
naked as the day you were born
mother-naked
scantily clad
naked
birthday-suited
topless
uncovered
nudish
unclothed
underwearless
uncoated
unnaked
nonwrapped
pure and simple
unwrapped