a tad
A small amount, portion, or degree; a bit. Can you turn the heat down a tad? It's getting pretty warm in here. I'm feeling a tad sick, so I think I'll stay home from work today.
tad
n. a bit; a small bit. That’s a little more than a tad, but it’s all right.
a tad
To a small degree; somewhat: acting a tad silly; a tad uncomfortable.