What does decir algo (a alguien) mean?
Expression
to let somebody know
Algo here means "an answer", not "something". Dime algo mañana is not asking for any old sentence: it is asking for a decision. It is one of the most used ways of closing a conversation without quite closing it, and it is very easily misread if you translate it word for word.
Mírate el presupuesto y me dices algo.
