Are you f–king serious? 

New York football fans barely cracked the top 10 list of most foul-mouthed fans in the NFL, despite both teams’ failures last year enraging their followers, a new study claimed. 

Betting site FlashPicks determined the league’s biggest potty mouths by scouring expletive-laden posts on each of the 32 teams’ Reddit channels and counting the total number of profanities. 

The Detroit Lions, having clinched their first division title since 1993 last season, also nabbed the ignoble honor for the rudest fans, who spewed an impressive 288 expletives in the subreddit — including a trio of C-bombs. 

The Las Vegas Raiders came in second, with fans lobbing a total of 274 swears, followed by the Pittsburgh Steelers, with 238 curses.

Despite Gang Green’s 7-10 record last season — which kicked off with quarterback Aaron Rodgers tearing his Achilles in the opening game — Jets fans restrained themselves to deploying just 170 curses on their page, including 53 F-bombs, good for 10th. 

“We’ve been an inept, mediocre franchise, and the ranking is fitting for that,” Joe Parvadila, a long-suffering Jets fan and podcast host, told The Post. “We’re not top five, we’re not in the bottom — we’re in the middle of that mediocrity.” 

The Giants, who had just six wins last season and missed the playoffs, were 29th, logging 80 curses.

The Jacksonville Jaguars’ devotees turned out to be the league’s sweetest fanbase last year, posting just 48 swears on their subreddit. 

Philadelphia Eagles mavens, who in addition to hurling a storm of profanities also threw part of a fence and climbed traffic poles after last year’s Super Bowl loss to the Kansas City Chiefs, bizarrely proved more buttoned up online. The bird-brained diehards fired off just 154 expletive-laden rants, putting them 16th in the league. 

Callum Broxton, head of operations at FlashPicks, cautioned against writing off all football followers as a bunch of swear-happy oafs. 

“Foul-mouthed fans are in the minority, as less than 1% of the words used on each subreddit were curse words,” he said.