ちっとも〜ない・少しも〜ない
not at all, not in the least
ちっとも / 少しも + negative
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ちっとも with a negative means "not at all": この映画はちっとも面白くない, "this film isn't the least bit interesting".
It's like 全然 (N5), but more emotional and a little childish or complaining in tone. 少しも means the same and is more neutral.
Like めったに, it needs a negative: ちっとも知らなかった, "I had no idea at all"; 雨がちっともやまない, "the rain just won't stop".
Compare あまり〜ない, "not very", which is mild. ちっとも is total, and usually expresses frustration or surprise. Like 全然, it needs a negative, so a positive verb after it is always wrong.
Examples
この映画はちっとも面白くない。
This film isn't the least bit interesting.
彼はちっとも話を聞いてくれない。
He doesn't listen to me at all.
雨がちっともやまない。
The rain just won't stop.
何度練習しても、ちっとも上手にならない。
However much I practise, I don't get any better at all.
ちっとも知らなかった。
I had no idea at all.