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