Role playing may refer to;
1) The act of dressing up as part of a sexual relationship.
2) Online games, eg World Of Warcraft, as in an MMORPG game, in which a person controls the actions of an on-screen character.
3) Using social networking sites, eg Bebo or MySpace to act out actions of a character either canon (from anime/manga/TV programmes/etc) or non-canon (original characters made up by the roleplayer).

Commonly associated with "geeks" and "nerds".
Commonly shortened to RP

Stupid rules that shouldn't exist. They say what people should and shouldn't do, based off their gender.

Acting a role that is not your usual way of life.

Someone you typically look up to.

A type of relationships between man and a woman, where woman acts more actively, like a man in traditional relationships, hence the name, and man acts passively. Inviting a man to a date, for example, defending him or giving him presents.

When your balls go over your head

1. (General) A person in a nontraditional position
2. (A lifestyle) a lifestyle/ household (normally this applies to a heterosexual couple) in which the male is the home maker (house husband) and the female is the breadwinner.
3.( a personality type/ relationship type) by which a straight male acts feminine. And in turn a female is very masculine

For further reference see

*the term "house husband"
*the anime " life is like a cocktail"
*the manga "otomen

For an example see the word otomen