Stupid effin’ old man’s twittering nonsense? (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

*(eff) [anag: stupid ] in COVE (chap, or "old man") and semi &lit. Early in the morning of May 31, 2017, Donald Trump posted something on Twitter that included this obvious typo, which may have been intended to be "coverage". He removed the tweet a few hours later, but not before it had gone viral.