literally: hit to the point of deafness; Generally refers to hearing problems
Definitions (粵典–words.hk)
動詞
因為年老而聽力衰退 to be occasionally deaf because of old age
我撞撞哋聾，講嘢都大聲咗，以為人哋會聽唔清我講乜。
我撞撞哋聋，讲嘢都大声咗，以为人哋会听唔清我讲乜。
ngo5 zong6 zong6 dei2 lung2, gong2 je5 dou1 daai6 seng1 zo2, ji5 wai4 jan4 dei6 wui5 teng1 m4 cing1 ngo5 gong2 mat. I've been speaking more loudly since I started having hearing problems, because I thought others didn't understand what I was saying.
Examples (Tatoeba—Cantonese-English)
Cantonese
阿Tom撞聋㗎可？
阿Tom撞聾㗎可？
aa3 Ｔ o m zong6 lung4 gaa3 ho2 ？