English Slang šKnocked Up Ā Ā Meaning: If a woman gets āknocked up,ā it meansĀ she got pregnant ā often unintentionally (without wanting or planning to).Ā āHave you seen Sally lately? Is she gaining weight or did she get knocked up?ā Be careful:Ā āKnocked upā is not a very nice expression. Donāt say it about yourself, andĀ neverĀ say it directly to a pregnant woman.