Before Dion Lewis was hauled off to jail last week, he allegedly called cops "p***ies" and threatened to spit on an officer -- this according to new court documents, obtained by TMZ Sports.
In the docs, Seminole Police Dept. officers say they were called out to the Seminole Hard Rock Hotel & Casino Tampa in Florida at around 2 PM on Sept. 18 after venue security claimed Lewis was being "unruly."
Cops say the former New England Patriots running back was told he had to leave the property ... and was escorted out to valet where authorities said they allowed him to either cab it or Uber it away from the premises without further repercussions.
But, according to the docs, "Lewis became belligerent in front of other casino patrons, calling officers 'p***ies,' and advising he was not leaving property because he did nothing wrong."
He then allegedly said he'd spit in a sergeant's face "if he touched him."
Ex-Patriots Star Dion Lewis Pleads Not Guilty In Casino Trespass Case
Lewis was taken to a nearby jail a short time later ... and ultimately charged with misdemeanor trespassing.
His attorney submitted a not guilty plea on the former tailback's behalf earlier this week. He's now due back in court next month.
Lewis -- who won one Super Bowl with Tom Brady -- has not yet publicly commented on the case.