Boy as uncountable noun

aramahosiCan you say "There's too much boy in the bathtub."?

Yes you can say that. It is an idiomatic way to say that the boy is too big for the bathtub.

Thanks very much, LouiseT.

LouiseTthe boy is too big for the bathtub

The book claims that the expression describes there's a large number of boys in the bathtub. Is this kind of interpretation possible as well?

Yes it is.

There is too much of something for the bathtub. That something in this case is a quantity of "boy". Used in this idiomatic way as uncountable it can be one or many. This is a humorous expression.

The logic enabling this kind of expression has it that the number of boys is too much to count them(the individuality gets unclear) therefore the noun is regarded as uncountable noun. How about my understanding?

I don't think that there are too many boys to count. There are just too many to fit into the bathtub in any functional way. If the bathtub is small there may only be 2 or 3 boys. You cannot bring logic to this as the writer is using "boy" as he would "rice" we have no idea of the quantity from this statement other than that the quantity is too much for the bathtub.