also: ちょびと
Casual, colloquial adverb meaning a very small amount or degree. Often used in informal speech.
Let me taste just a tiny bit.
I got full just from eating a tiny bit of dessert.
These clothes might be a little too big.
Can you help me out just a tiny bit?
Adding just a tiny bit of soy sauce to the miso soup sharpens the flavor.
たくさん means 'a lot', the opposite extreme from ちょびっと's 'just a tiny bit'.
Likely derived from ちょっと with an emphatic or diminutive suffix び, but the exact origin is uncertain.