Definition & Meaning of "knocked up"in English

What does "knocked up" mean in slang?

The adjective "knocked up" means to be pregnant, usually unexpectedly or without planning. The structure is informal slang where "knocked" implies sudden impact and "up" intensifies the result. It is commonly used in casual speech and media, but it is considered blunt and sometimes rude. The phrase became widely recognized in American English through pop culture and comedy usage.