Cross dresser

[Sarah]

Someone who wears either items of clothing or complete outfits traditionally associated with the opposite sex. Most people who are called crossdressers are heterosexual males. Most women crossdress, but female crossdressing is considered normal.

[Couch Potatoe]

A man who likes to dress up in pretty clothes, little skirts, stockings, make-up, jewelry. We like to dress up as women and enjoy all the things a woman does.

[Justin Bieber]

A male or female who wears clothes that are stereotypically worn by the opposite sex.
For women, it is debatable whether in this day an age trousers/pants count as cross dressing.
Cross dressers are often put into the [transgender] group, however it is important to know that a cross dresser does not necessarily have body or gender dysphoria, and can be perfectly happy with their gender identity assigned at birth.
Most transgender individuals do not appreciate being called cross dressers as they consider themselves, and should be considered by others as the gender they are dressing as.
A [transwoman] wearing girls clothes is not a cross dresser, nor is she a man in drag. Shes just a woman.
Cross dressing can be a hobby or maybe just a fashion sense. Someone who cross dresses does not necessarily cross dress 24/7.
Cross dressing can also be found to be sexually attractive by some.

[PussyCat]

a guy that dresses in womans clothing