You know - that title under your name. It's official appellation is User Title!
So for the following post counts they are
10,000> omega
5,000-9,999 alpha
3,000-4,999 big-cheese
2,000-2,999 supremo
1,000-1,999 post-grad
500-999 graduate
250-499 senior
100-249 member
20-99 junior member
0-19 new member
So for the following post counts they are
10,000> omega
5,000-9,999 alpha
3,000-4,999 big-cheese
2,000-2,999 supremo
1,000-1,999 post-grad
500-999 graduate
250-499 senior
100-249 member
20-99 junior member
0-19 new member