Note to translator (@arisboch): 'Хуй' is singular 'cock' (dick), 'Хуи' is plural for 'cocks' (dicks)... Although the author could have simply forgotten about the breve.

@Gardares said:

Note to translator (@arisboch): 'Хуй' is singular 'cock' (dick), 'Хуи' is plural for 'cocks' (dicks)... Although the author could have simply forgotten about the breve.

I'd say the latter is more likely.