Do you think I should throw my new assistant manager under the bus to our district manager
Is there a particular thing your manager did to make you would do that?
Apart from her making mistakes, she walks like a robot.
Everyone feels annoyed by their boss at some point, but trying to get her in trouble for petty things is mean. Try to look past her small mistakes, or figure out a way to help her. Telling on her will only make you look petty in front of the district manager.
Nah, I'm getting good at throwing my coworkers under the bus.
Are you sure that's something to be proud of? My workplace is a lot more fun when everyone gets along. Aren't you worried that your coworkers will hate you?