This manager needs a lesson taught

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She isn't a complete manager, more a supervisor type position. She just was hired not even a month ago or just over. She is around my age believe she was a year younger. Now we have some managers that are younger early 20's. I have no issues taking orders from somoene younger if they have the right attitude. I know they are in charge, and will listen. But many don't have retail expirience (why I refuse being a manager as it is stress I don't need). This supervisor has faked an arm injury, where she can't lift anything. She has the biggest attitude, now normally I go to work, and do my job going home. Well it's to the point I don't care if I go to work or not. I can't stand her attitude, and shocked I haven't snapped. It is not just me who thinks this either all the other staff but the younger teenagers (who don't do their jobs like her). She is very immature, and just doesn't know the concept of life (I need a job to pay my bills, and well survive sort of speak whereas she lives with her parents, and goes out drinking all the time). The one groomer had said to me she believes this girl is jealous of me because she has the biggest attitude, and remarks towards me. I just walk away and don't even talk to her at all I cringe having to talk to her.