大不了

大不了:

Literally means:

serious; at the worst 【BR

Actually means:

It means being serious or terrible. This phrase is often used in the negative form, and sometimes used in the interrogative form. It has the implication of displeasure, defiance or indifference.

At the worst. It indicates the worst possible situation.

严重，了不得；了不起。多用于否定式，有时用于疑问式。有不满、不服气或不在乎的意味。

最多也不过如此。表示最大限度的估计。