What does un poquito nada mas mean in english?
I think it means nothing but a little, but I would like to make sure because it doesn't really make sense with the rest of the context that I have.
"Just a little" would work if it's about being served food or drink. If you split the sentence then it would be: "Just a little..." and then "When" if it was a drink being poured.
The "when" means basta, taken from the phrase "say when".