This is from Good Luck Charlie.
PJ took the baby out to the park. But he brought a wrong baby home. The children were anxious. At this moment, mom called to ask how was it going with the baby. Teddy told her everything was great. After she ended the call, PJ said,
Not that I'm in the position to criticize, but I was getting more monkey.
I guess it's an idiom. But what does it mean? Does it come from monkey on one's back?