If a cour orders your account to put on hold what does that mean?

Short answer: It means you're screwed.

Long answer: You can be nailed for all kinds of things that would cause a hold to be put on your accounts. If you are implicated in a financial crime (fraud, theft, embezzlement), are a fugitive from police (to prevent you from having resources to aid your flight), you are in unbelievable debt or other reasons, a court can order that a "hold" be put on your financial accounts (savings, checking, etc.).

This means that neither you, or (usually) anyone else who's name is on the account can withdraw, deposit or move any money in that account. This condition will stay that way until the court lifts that hold.