1. Extremely unpleasant, offensive, very annoying, odious or contemptible.
    He was an especially obnoxious and detestable specimen of a man.
    Throwing stones at the bus is another example of your obnoxious behaviour.
  2. exposed to harm or injury.

The above text is a snippet from Wiktionary: obnoxious
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!