那么些 is a colloquial demonstrative pronoun meaning 'so much' or 'so many' — it emphasizes a large quantity, often with a tone of surprise, complaint, or exaggeration. It's built from 那么 ('so, like that') and 些 ('some, a few'), but unlike 那么多 ('so many'), 那么些 implies a specific, often excessive amount that the speaker is reacting to. It's typically used in informal speech and can sound a bit more emphatic than 那么多. For example: 你买了那么些东西! ('You bought so many things!') — the speaker is surprised or mildly critical.