大概是他怕水而我姓俞
[dà gài shì tā pà shuĭ ér wŏ xìng yú]
It translates to 'Probably because he's afraid of water while I have the surname Yu,' using 'Yu' which can mean carp (a water-dwelling fish) or be a surname, humorously connecting the fear of water with the name. However, this interpretation might vary as it seems to be part of a personal narrative.