I can't stand her when she 'acts/gets (all) high and mighty' like that.
He's not so 'high and mighty' now that he needs our help.
It took a 'mighty' effort to get everything done on time.
(..) or their mug. Not me. I manage to lose an entire dragon. Oh, wow. I did it. I did it. This fixes everything! Yes! I have brought down this mighty beast! I'm going to kill you, dragon. Then I'll cut out your heart and take it to my father. I am a Viking. I am a Viking! I did this. (..)2010 How to Train Your Dragon