Terrell Suggs Allegedly Brandished Gun, Threatened To Kill Man During Starbucks Tiff

10:23 AM PT -- Suggs, through EAG Sports rep Denise White, issued a statement on the incident to TMZ Sports ... and Terrell says he was in fear for his safety. "I was in a quiet area of Scottsdale in the middle of the day in a Starbucks drive-thru…