Justin Bieber Not Backing Down Against Baby Accuser

TMZ broke the story, Yeater dismissed the suit last Thursday, after Justin and his team made it clear ... they were going to sue Yeater and her lawyers for filing a malicious claim.

Despite the fact that Yeater's claim has now been dismissed and the 2 lawyers who filed it have quit, Justin is not backing down from his threat.

The singer's publicist, Matthew Hiltzik, tells TMZ, "We intend to still hold them accountable."