这么点儿 is a colloquial contraction of 这么 (such) and 一点儿 (a little), used to emphasize that the quantity or amount is very small, often implying insufficiency or disappointment. It functions as a determiner before a noun or as a predicate complement. For example, ‘这么点儿东西’ means 'such a small amount of stuff'. It is informal and typical of spoken Chinese.