original meaning: a big winter melon; can be used to describe a stupid or clumsy person; an oaf
Definitions (粵典–words.hk)
名詞
引申指又矮又肥嘅人 (量詞:舊/個) people who are short and fat; literally mean a big winter melon
阿姨話佢大肚嗰陣成舊大冬瓜咁。
阿姨话佢大肚𠮶阵成旧大冬瓜咁。
aa3 ji1 waa6 keoi5 daai6 tou5 go2 zan6 sing4 gau6 daai6 dung1 gwaa1 gam2. My aunt said she was so fat that she looked like a big winter melon during her pregnancy.
名詞
引指申形容行為笨拙嘅人 (量詞:舊/個) used for describing a clumsy person
佢成舊大冬瓜咁碌咗落樓梯。
佢成旧大冬瓜咁碌咗落楼梯。
keoi5 sing4 gau6 daai6 dung1 gwaa1 gam2 luk1 zo2 lok6 lau4 tai1. He fell down the stairs like a big winter melon.