nonsensical:
–noun
1. words or language having little or no sense or meaning.
2. conduct, action, etc., that is senseless, foolish, or absurd: to have tolerated enough nonsense.
3. impudent, insubordinate, or otherwise objectionable behavior: He doesn't have to take that nonsense from you.
4. something absurd or fatuous: the utter nonsense of such a suggestion.
5. anything of trifling importance or of little or no use.