what do you call it when someone pays back a loan quickly

Sudden pay back

Ayy a person from the close past. Helllllooooo Ally. You won't ever see this but hi.

ally you're a decade late

When someone pays back a loan quickly, it is typically referred to as "paying off the loan early" or "early loan repayment." This means that the borrower has settled the outstanding balance of the loan before the agreed-upon repayment term.