English basement

(US) A simple, often damp, basement that has an earth floor.

(North America, Philippines) The floor of a building at the level of the street or surrounding ground; the ground floor.

(UK, informal, derogatory) An extensive luxurious basement added to a home to avoid the difficulties of building an extension above ground.

(North America) An outdoor passage offering access to a basement.

(informal, derogatory, by extension, mostly, internet slang) A nerd or geek; a person lacking a social life.