I agreed to let him join us, even though it was 'against my better judgment'. [=even though I did not think it was the best thing to do]
In my 'judgment' [='opinion'], the stock has performed badly. = It is my 'judgment' that the stock has performed badly.
“Were his policies good or bad?” “I'll have to 'reserve/suspend judgment on' that. It's too soon to know.”
(..) - Yeah! Oh this is gonna be beautiful. Clint, you've had a tough week, we won't hold it against you if you can't get it up. Y'know I've seen this before, right? And I still don't know how you do it. - Smell the silent judgment? - Please, Stark, by all means. - Oh, Here we go. - Okay. - Uh oh. (..)2015 Avengers: Age of Ultron