0 (of opponents in a tennis match) to have a short practice before starting on the match (noun knock-up) -- ฝึกซ้อม (ก่อนลงแข่งจริง)
The two players were knocking up before their semi-final match.
1 to make a woman pregnant -- ทำให้ผู้หญิงตั้งครรภ์ (คำสแลง)
She got knocked up when she was only 17 years old.
