Barack Obama took his first shot at his predecessor since inauguration day, lightly jabbing President Trump’s speedy Twitter fingers … and reportedly made a ton of money while doing it.

The diss came Thursday in NYC while the ex-prez was speaking to a crowd of A&E Network’s advertisers. While presidential historian Doris Kearns Goodwin interviewed Obama, she asked how he handled frustrating moments in the White House.

Barack coolly replied, “For starters, by not having a Twitter account.”