Letters that make in your birthday suit
s, a, o, b, d, n, h, r, t, i, u, y are letters that make 'in your birthday suit'
Words within in your birthday suit
IT, ThD, birth, IR, DA, Day, day, in, suit, Ur, IN, birthday suit, Bi, In, Ir, Th, birthday are words within 'in your birthday suit'