Lamar Jackson says he's sorry for sending a vulgar tweet following the Ravens' emotional 28-27 loss to the Jaguars last Sunday ... admitting on Friday he was just "bitter" about the L.
"I apologize if I hurt feelings out there," Jackson said when addressing reporters for the first time since pressing send on the tweet.
Jackson initially fired off the obscene response minutes after Baltimore's defeat ... after a Twitter user said the Ravens should not sign the QB to a lengthy -- and lucrative -- new contract.
"Boy STFU y'all be cappin too much on this app mf never smelt a football field," he said ... before ending the tweet with, "never did s*** but eat a d***."
Ravens head coach John Harbaugh said he spoke to Jackson over it all on Monday ... and called it "out of character for him."
Jackson said he deleted the tweet, which remained on his page for about 3 hours, after his girlfriend encouraged him to take it down.
She "was like, I think you should delete it," LJ said. "I'm like, 'All right 'cause I don't know if I hurt somebody's feelings,' so I did. That's just what it was. That's why I deleted it."
Jackson said he hasn't reached out to the fan since the incident, but explained there's no bad blood between him and the individual.
"What I take from this experience ... don't say nothing on Twitter," Jackson said. "Don't say what I said 'cause it's kids watching. Don't need the kids saying that but just watch what you say."
"Just try to stay off Twitter if anything if something like that happens again."