He'll fiddle with his socks and pull them up.

他会玩弄他的袜子，并将其往上拉。

youdao

If he's hoping to gain promotion he will have to pull his socks up.

他如果希望得到提升，就得再加一把劲。

youdao

My father lost his job. Since now we have to tighten our belts, But our families will not lower our head to fate. We'll pull up our socks.

译文：父亲失去了工作，从现在起我们必须要勒紧腰带度日了，但家人不会向命运低头，我们会奋发图强。

youdao

So Joe will have to pull up his dance socks to catch former Hollyoaks actress Ali Bastian, now Pc Sally Armstrong in the Bill, who scored the highest in Friday night's show with 30 out of a possible 40.

BBC: Calzaghe trails after dance debut