A note calling for periodic payments which are insufficient to fully amortize the face amount of the note prior to maturity, so that a principal sum known as a "balloon" is due at maturity.

一种周期性付款到期前不足摊还面额的贷款，所以称作“气球”的本金额到期时需要一次付清。

youdao

The loan-to-value ratio--well it's not so much the loan--the maturity was short and the balloon payment at the end that they changed.

贷款价值比率,不,就是期限太短了,期末大额偿还也是罪魁祸首

耶鲁公开课 - 金融市场课程节选

In Congress, a predatory-lending bill sponsored by Senator Paul Sarbanes would prohibit balloon payments, among other things, in which the bulk of a loan is left unpaid at maturity, often without the full understanding of the borrower who then cannot repay.

ECONOMIST: Lawmakers, state and federal, are mounting an attack