Lamar Jackson deleted a vulgar Tweet Sunday night ... a few hours after going in on a fan who criticized his play on Sunday.
"When someone asking for over $250 mil guaranteed like [Lamar] ... games like this should not come down to [kicker Justin Tucker]. Let Lamar walk and spend that money on a well-rounded team," a fan wrote on Twitter shortly after the Ravens lost a shocker to the Jaguars.
25-year-old Jackson, clearly emotional, responded ..."Boy STFU y'all be cappin too much on this app mf never smelt a football field," before ending the Tweet with a vulgar term.