This work is based on the theories of Social Anthropology deriving from the house and street by Roberto DaMatta, in an attempt to circumscribe the limitrophe spaces within Brazilian society. It is well known that the Brazilian people display a preference for relationships with more intimacy and familiarity, features of the house relations, in opposition to distant and unfamiliar relations: street. However, the phenomenon being analysed in this work is the existence of a third space, ambiguous and limitrophe, neither located in the house, nor in the street. We also point out that this space is represented by a series of linguistic, social and spacial events, for the Brazilian people, usually, tend to place their interactions in this limitrophe space, as an effort to establish a greater proximity with their interlocutor, even being at the space of the street. Besides that, we also show that these concepts of house, street and limitrophe spaces can be applied to the teaching of Portuguese as Second Language for Foreigners, since the acquisition of a second language is related not only to linguistic features but also to the social and cultural ones.