Simultaneously freebooting someone else's video, claiming it for your own, while also humblebragging about its greatness.
Random Person 1: Man, my video about the American Empire only has 1.4 million views. How frustrating.
Random Person 2: 1.4 million views is awesome, and it's not even your video! It's CGP Grey's! Stop humblejacking, you chump.
Random Person 2: 1.4 million views is awesome, and it's not even your video! It's CGP Grey's! Stop humblejacking, you chump.
by Boondoggy July 16, 2014
Lowering expectations to make yourself seem more humble when you do succeed by complaining about how bad you are.
Grey: I wish I had a couple more years to edit this video and do more research. It is so terrible.
Brady: Stop humblejacking, we all know everybody will love it.
Brady: Stop humblejacking, we all know everybody will love it.
by Pop2323pop September 7, 2014