watery wine (usually only said out of a modest gesture by the host rather than the wine being actually watery in reality)
Definitions (粵典–words.hk)
名詞
字面指味道好似水咁淡嘅酒，用嚟向客人謙稱自己嘅酒 watery wine (usually only said out of a modest gesture by the host rather than the wine being actually watery in reality)