NFL fans flipped the league the bird over Thanksgiving.

Ratings for each of the three games played on the holiday — where pigskin on the tube is as traditional a side dish as stuffing and cranberry sauce — fell double-digits from last year.

The Minnesota Vikings-Detroit Lions early game on Thursday produced a ratings decline of 10 percent compared with the early game a year earlier, according to reports.

The second game, between the Dallas Cowboys and LA Chargers, saw ratings tumble 25 percent.

The late game between the New York Giants and the Washington Redskins produced a rating down 19 percent from 2016.

Only NBC’s “Sunday Night Football,” which featured the Pittsburgh Steelers clinching a last-second win over the Green Bay Packers, posted a ratings gain — a modest 3 percent increase over 2016.

“Monday Night Football” on ESPN had its weakest ratings this season — down 33 percent from the previous season’s Week 12 “MNF.”

Two other games barely spared themselves double-digit decreases: Fox’s Sunday broadcast of the Philadelphia Eagles’ 31-3 victory over the Chicago Bears was down 9 percent, and CBS’ Sunday airing of the Miami Dolphins’ 35-17 loss to the New England Patriots was down 8 percent.

The ratings shortfall remains troubling given the NFL’s historic dominance of TV viewing.

The weak ratings week, moreover, couldn’t keep President Trump from commenting on what he perceives to be the league’s lax treatment of players who’ve been kneeling in protest during the national anthem.

The story is no longer just about getting viewers in front of their TVs, he asserted, it’s also about attracting enough fans to fill up NFL stadiums.

“The American public is fed up with the disrespect the NFL is paying to our Country, our Flag and our National Anthem,” Trump tweeted on Monday. “Weak and out of control.”