Although originally defined as "something atrocious" in a context such as "cutting up that dead baby and placing its parts in fridges all over the US is a heinous crime", heinous has evolved into a slang word used to imply feelings of discontent, anger, meloncholy, satisfaction, happiness, approval, or other random feelings.
after school: "OMG, that math test was so heinous"
insult: "ur mom is heinous"
random comment: "heinous bananas"
approval: "O man, those spandex pants are so heinous!"
random comment : heinous repeatedly because we know what it sounds like
I feel bad: heinous
I feel good: heinous
Life sucks: heinous
Life is good: heinous