Definition
to withhold assistance or information from an individual
Even when he asked for help, she chose to hold out on him.
Withholding the truth in this situation will only make things worse.
I would be disappointed if you held out on me about anything.
to decline to provide financial assistance to someone
He refused to lend him money when he was in dire straits.
She held out on her friend during his time of need, leaving him feeling alone.
One should not hold out on friends when they are in trouble.