Michael Jackson Estate -- Wade Robson Is Full of It

Lawyers for the Michael Jackson Estate are scoffing at Wade Robson's creditor's claim ... saying it's absurd he had no idea for nearly 4 YEARS that the Estate was being probated and there was a deadline for filing claims.

Attorney Howard Weitzman wrote incredulously ... the MJ probate is one of the most high-profile ever, and Wade is very connected in the music biz. So, Weitzman asks, how could it be he had no idea there was a deadline of 4 months after the Estate proceedings began to file a creditor's claim?

TMZ broke the story ... Robson has filed the claim, alleging MJ molested him for 7 years -- between the ages of 7 and 14.

Weitzman is asking the judge to reject Robson's claim on grounds it was filed ridiculously late.