Trigggls : Having 10000 - 10100 credits in a project.
Boks : Having 100000 - 101000 credits in a project.
Teraboks : Having 1000000 - 1010000 credits in a project.
Maxwells: Having at least half the milestone count of the #1 person in a category. For example: in the 500k category, let's say the #1 person has 70 projects. If you have at least 35, you get a Maxwell.
Clanks: number of projects you've earned credit in during the past 28 days.
Vaios: number of projects where you rank in the top 5 based on your join date.
MiRBs: number of milestone categories in which you rank in the top 1000, excluding the MiRB category itself.
With the exception of MiRBs and Boks(though he's an honorary team member in my book), the stats are named after the SETI.USA team members who came up with them.