The tattooed suspect accused of stabbing a woman to death in a savage caught-on-camera brawl outside Manhattan’s Port Authority Bus Terminal last month laughed as she faced a judge Monday — setting off one of the victim’s grieving relatives who had to be dragged out of court.

Samaria Lopez flashed a sinister grin and chuckled as she pleaded not guilty to second-degree murder in the vicious attack that left 22-year-old Jordin Walston dead.

Graphic surveillance footage captured the moment that Lopez, 22, lunged at Walston during a sidewalk tussle around 10:15 p.m. near the intersection of West 40th Street and Eighth Avenue on June 11.

Lopez then allegedly knifed Walston twice in the chest, puncturing her aorta — and even taunted her after as she struggled for her life, prosecutors said at her Supreme Court arraignment.

The victim was rushed to Bellevue Hospital, where she was pronounced dead, cops said.

Lopez fled the gory scene and was arrested by police three days later after she tried covering up her tracks by changing her phone numbers and addresses, prosecutors said.

Ahead of Monday’s arraignment, the families of Lopez and Walston had to be separated and forced to sit on opposite sides of the courtroom after the victim’s family complained that the alleged killer’s side refused to move to a different area to give them space.

The dispute caused a shouting match between the families, with the tension only escalating when Lopez entered — flashing a wide, evil smile.

The grinning suspect, who has a prominent neck tattoo, set off one of Walston’s relatives, who then had to be physically removed from the courtroom.

“That nasty f–king b–ch,” the unidentified family member said after seeing Lopez smile.

The woman continued to mumble slurs and sarcastically called Lopez’s smirk “cute” as she was dragged out of the appearance by several court officers.

“That was funny…that sloppy nasty b–ch,” the woman yelled.

Manhattan Supreme Court Judge Curtis Farber told the court he would not tolerate bad behavior before arraigning Lopez, who faces life in prison if convicted of the murder charge.

However, that didn’t stop another family member of the victim from getting in one more jab — when she was heard saying in the direction of Lopez’s family that her “baby is gonna die by the same fate” as Walston.

The families were eventually escorted out of the courtroom separately by court officials.

Lopez’s next court appearance is scheduled for October 22.