EXCLUSIVE"So You Think You Can Dance" judge Mary Murphy is trying to get a judge to toss out the $200,000 default judgment her former manager won against her this week ... claiming it was a mistake by her lawyer that caused her to lose the case.
As TMZ first reported, Michael Sanchez sued Murphy back in May for lost commissions ... and along the way made some salacious accusations involving sex and drugs.
Earlier this week, Sanchez was awarded $205,160 -- plus 10% of any future earnings Murphy rakes in from SYTYCD -- because she failed to respond to the suit.
But according to docs filed right after the decision, Murphy's lawyer claims the fault lies entirely with her ... claiming she got her dates screwed up and that's why the answer wasn't filed on time.
The lawyer is asking the judge not to hold Murphy responsible for her mistake. The judge has yet to rule.