Shannon Sharpe is coming clean about his wild social media activity on Wednesday ... admitting he was not actually hacked when his Instagram went live during a sex act.
The Denver Broncos legend opened up on the shocking incident on his "Nightcap" show just minutes ago ... and he's chalking it all up to not being very tech-savvy.
"Obviously, I'm embarrassed for someone who is extremely private." Sharpe said ... adding he's "disappointed" in himself -- not for engaging in the act, but for the aftermath, especially how it affected people in his circle.