To a small extent; in a small amount.
Could you move that up a bit?
Slightly; rather.
Isn't that hat a bit small for him?
Very.
That hat seems a bit small for him.
A small amount.
Q: Care for some cake? A: Argh, you've twisted my arm — I'll have just a bit, thank you.
Select a language to see translations
A large amount.
Q: How much trouble did you stir up last night? A: Just a bit.
LekhoriLekhori