Tenure brag
When someone highlights how long they have been doing something (years playing a sport, years working in a company, years living in a neighborhood, years sober, overall age, etc). This is type of brag or showing off, highlighting the speaker's status based on the amount of time they've been around
There goes Thomas tenure bragging again about how he's been sober longer than anyone else at the party!
Tenure brag
When someone brags about how long they've been doing something - It is generally an age/time related brag ("I've been doing this since you were in diapers!") but can also be the number of times they've done it ("this is my 15th time at burning man!"), etc.
We made it about 15 minutes into the neighborhood meeting before Tom started tenure bragging about how he's lived on that street the longest!