What are the pajamas with the butt flap called?
It may also be referred to as a butt flap or trap-door.
What is a full-body pajama called?
The blanket sleeper (also known by many other synonyms and trade names) is a type of especially warm sleeper or footie pajama worn primarily during the winter in the United States and Canada.
What is the point of trap door pajamas?
Some pajamas feature a drop seat (also known as a trap door or butt flap): a buttoned opening in the seat, designed to allow the wearer to conveniently use a toilet.