Meckley Mingo is one of the Mingo kids, as well as being the leader. He is a minor antagonist in the 8th book, Hard Luck and the 13th book, The Meltdown . At the end of Hard Luck, He's shown chasing Greg Heffley and Rowley Jefferson. His belt also appears in the first page. He also makes an appearance at the climax of The Meltdown.
- Meckley, as described by Greg, "always wears a tank top and a belt with a metal buckle." His stature is noticed while he is chasing Greg and Rowley, he appears to be quiet tall and looks overweight.
- Not much is known about Meckley, but he is most likely cruel and short-tempered.