An expression commonly mistaken with "what's the haps", What is you up to is the complete opposite. The expression simply means to wonder as to what activities another individual is partaking in at any given moment.
What did you think was gonna pop up? THINK ABOUT HOW TO MAKE PROGRESS IN LIFE! THINK ABOUT WHAT YOU WILL DO! Learn some Spanish or meditate. Go for a jog come on, you got this!