HYMS by definition means Hate Your Mom Syndrome. Cases can vary from mild cases to just not liking her to hating your mom so much that you could kill her. People with HYMS usually find themselves in daily situations where they hate their mother.
Tyler: Yo Dave, any HYMS recently?
Dave: No, how 'bout you?
Tyler: Yea last night my mom made me wash dishes when I
had my girlfriend over. Such a classic case of HYMS.