Baby One Piece Pajamas

one piece
(of clothing) consisting of or fashioned in a single whole piece; "a one-piece garment"
(One-pieces) A one-piece swimsuit is a usually skin-tight one-piece swimsuit worn by women and girls when swimming in the sea or in a swimming pool, or for any activity in the sun, such as sun bathing. The one-piece swimsuit usually covers a female's torso.
An article of clothing made or consisting of a single piece
One Piece also referred to as Shonen Jump's One Piece is a 2-D platforming adventure video game for the Nintendo Game Boy Advance based on the popular Japanese Anime and Manga series One Piece. Developed by Dimps and published by Bandai, it was released on September 5, 2005.

pajamas
(pajama) a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
Pajamas, also spelled pyjamas (see also spelling differences) can refer to several related types of clothing. The original paijama are loose, lightweight trousers fitted with drawstring waistbands and worn in South and West Asia by both sexes.
A pair of loose pants tied by a drawstring around the waist, worn by both sexes in some Asian countries
(pajama) (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
A suit of loose pants and jacket or shirt for sleeping in

baby
A very young child, esp. one newly or recently born
a very young child (birth to 1 year) who has not yet begun to walk or talk; "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different"
A young or newly born animal
pamper: treat with excessive indulgence; "grandparents often pamper the children"; "Let's not mollycoddle our students!"
The youngest member of a family or group
the youngest member of a group (not necessarily young); "the baby of the family"; "the baby of the Supreme Court"