嚡過沙紙 (haai4 gwo3 saa1 zi2) — very rough / coarse in texture, rougher than sandpaper [colloquial] in Cantonese
haaiˎ₄嚡gwo˗₃過saaˉ¹沙ziˊ²紙简 嚡过沙纸
Mandarin Pinyin: hai5 guo4 sha1 zhi3
Meaning of 嚡過沙紙
nounvery rough / coarse in texture, rougher than sandpaper [colloquial]