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 quite tall and looks overweight.
Not much is known about Meckley, but he is most likely cruel and short-tempered.
Role in Hard Luck
Meckley is mentioned when Greg talks about the Mingo Kids and how Meckley is their leader. Once when Greg and Rowley stepped near Mingo Kid territory, one of the Mingos threatened them both, also mentioning Meckley. In order to avoid being chased by Meckley and the other Mingo Kids, Greg thinks about joining some after school clubs. At the end of Hard Luck, He's shown chasing Greg Heffley and Rowley Jefferson.
Role in The Meltdown
He also makes an appearance at the climax of The Meltdown. Meckley is shown at the end of the book, chasing Greg and Rowley. During the Battle of Surrey Street, the Mingo Kids join in and Meckley is among them, looking for his belt buckle (which Greg accidentally took when he and Rowley went into the Mingos' camp). During the battle, the snow plough comes through. Meckley and the Mingo Kids go back to their camp.
- It's possible that the group Mingo Kids got the name from Meckley's surname, due to him being the leader of the group.
- It could be possible that the Mingo Kids got their name from Meckley's last name. However, it could also be a nickname which all the leaders get.