look up any word, like darude - sandstorm:
 
1.
When someone says something so surprising to you that the only way to react is to add a syllable to "really", thus, redally.
Guy 1: Dude, did you hear? Bradey's Dad got a sex change. Now we have to call him Ms. Sugarlumps

Guy 2: Redally?!

Bradey: What are you guys talking about?
by Rihanna Townsend July 13, 2009