Ex-NFL Wide Receiver -- Busted For Weed ... Crazy Eyed Mug Shot

Former NFL wide receiver Jabar Gaffney -- who played for the Texans, Patriots, Jets, Broncos and Dolphins -- was busted for weed in Florida Friday ... TMZ Sports has learned.  Cops say the 35-year-old -- who was a 2nd round pick in 2002 --…