To play Basket ball in the street mostly in the neighborhood with friends/siblings
My uncle and I ball up every time he comes to a family reunion and he always get frost scores
Equivalent to "not gonna lie," "for real", "low key?," "genuinely," etc. Normally ending in a question mark.
Balls up? You really like her?
balls-up: a bungled or badly carried out task or action; a mess.
"She sure got my balls up"