Spoken Mandarin construction expressing a dismissively small quantity. Often paired with 就 (jiù, 'just') for emphasis: 就那么点儿. The 儿 is the Beijing-style retroflex (érhuà) — drop it (那么点) in southern speech.
register
Distinctly colloquial and northern-flavored — fits Beijing/北方话 dialogue but feels out of place in formal writing, where you'd say 这么少 or 仅仅那么一点.
