look up any word, like timebomb:
 
1.
To be used half jokingly amongst friends; use when an acquiantance does or says something out of the ordinary.
Your wingman suddenly decides that he would rather sit home and watch a movie than head out to the bars on Saturday night. "Billy, you've changed"
by Gravy November 19, 2004
 
2.
I've changed and you don't live up to my newly skewed standards.
- Wanna hang out like old Times?
- You've changed.
- WTF?!
by Woob November 26, 2004
 
3.
To act in a situation where you have never been seen like.
-Tom just tried to drown that girl in the lake.
-I have never seen him like this.
- You've changed
by DogFishHead February 12, 2010