The hashtag Ngakoue referenced was to former Dolphins offensive lineman Jonathan Martin, who accused Incognito and center Mike Pouncey of verbally abusing him.
Incognito had not responded to Ngakoue's charges as of Monday morning.
Richie Incognito, who was at the center of the Jonathan Martin bullying scandal in 2014 and suspended by the National Football League for his actions, once again has found himself in the middle of an ugly accusation.
Incognito resurfaced with the Bills in 2015.
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The Jaguars won Sunday's game, 10-3, eliminating the Bills from the playoffs.
No other Jacksonville players mentioned racial slurs or Incognito in the locker room after the game. Martin accused Incognito of harassment and player misconduct.
Ngakoue said he did not confront Incognito on the field. "You hear all type of stuff", Ngakoue added. Campbell also said it seemed like Bills players were deliberately trying to antagonize Jaguars players.
"I've been playing this game since I was a little kid". Stuff is not going to bother you, but when somebody says something about your ethnicity, that's really kind of taking it a little bit too far.
Jones said he could tell Ngakoue was upset but wasn't sure why.
How different was this than the usual trash talk? "I couldn't confront him. That's why we have this platform to use to try to help bring change".