Per Clevis Murray of The Athletic, the remark came after someone in the locker room wished Irving a happy Thanksgiving.
The comment likely goes far deeper than frustration following a disappointing loss to the 5-14 Knicks, as Weiss alluded to in a follow-up tweet:
Per Brian Windhorst of ESPN.com, "Irving was given the Lakota name Little Mountain by the Standing Rock Sioux tribe" in a late-August ceremony. Asia Irving, Kyrie's older sister, was also honored.
As Windhorst noted, "Irving's mother, Elizabeth Larson, was a descendant of the Standing Rock Sioux but was adopted out as a small child. Irving, whose mother died when he was four, has known about his lineage and has recently starting embracing it publicly."
While modern-day Thanksgiving is typically a time for family and friends to get together and share food and company, the historical roots of the holiday originate from a dark time in the Americas, when Native Americans suffered genocide at the hands of Pilgrims in the 17th century.
As Dennis Zotigh, a writer and cultural specialist at the Smithsonian National Museum of the American Indian, noted in 2016: "Many Natives particularly in the New England area remember this attempted genocide as a factual part of their history and are reminded each year during the modern Thanksgiving."
Therefore, Irving's comment isn't surprising given the context of the situation.