1. The coolest word ever invented...seriously
2. Whatever you want to say, or need to say, but can't get out, just put reher there instead.
Dude, that was totally reher man!
Hey, let's reher.
Check out this reher dizawg!
What the reher?
1. A pronoun to replace the name of a close aquantance or friend
2. More modernly it is a term for being a "monster" or being ridiculously good at something
3. Another word hailing from Ebonics.
Yo dawg. Whaddup?
Bro, Shaquille's a dawg!