a bit ...
1. slightly:
The dress is a bit too big for me.
That was a bit silly, wasn't it?
I'm a bit nervous.
I was hoping there'd be some food - I'm a bit hungry.
Would you like a bit more cake?
It's a bit like a Swiss chalet.

2. UK very:
Blimey, it's a bit cold!
And she didn't invite him? That was a bit mean!

[TahlilGaran] Advanced Learner's Dictionary ▲

a bit
n., informal A small amount; some.
There's no sugar in the sugar bowl, but you may find a bit in the bag.
If the ball had hit the window a bit harder, it would have broken it.
■ Often used like an adverb.
This sweater scratches a bit.
■ Also used like an adjective before "less", "more".
Janet thought she could lose weight by eating a bit less.
"Have some more cake?" "Thanks. A bit more won't hurt me."
■ Often used adverbially after verbs in negative, interrogative, and conditional sentences, sometimes in the form "one bit".
"Won't your father be angry?" "No, he won't care a bit."
Helen feels like crying, but I'll be surprised if she shows it one bit.
■ Sometimes used with "little" for emphasis, also in the emphatic form "the least bit".
"Wasn't Bob even a little bit sorry he forgot his date?" "No, Bob wasn't the least bit sorry."
Synonym: A LITTLE.
Compare: A FEW.
Antonym: A LOT.

[TahlilGaran] English Idioms Dictionary ▲