When someone attempts to be negative about an aspect of their life that is in reality, undeniably awesome. A way of verbally showing off without being super obvious or bragging outright.
She was complain-bragging that the hubcaps on her free car don't match her outfit.
He said "I hate that I have to wear a suit and tie to my six figure income job" - what a complain-bragger!
Example 1:
*Teacher walks by 2 kids doing homework*
Teacher: Is that chapter 15 due next period?
Kids: Yea, were comparing answers to further our education and brainstorm possible class discussion questions.
Example 2:
Greg: Here, lets compare answers. Unfortunately, I got all blanks.