off-the-wall

(adjective) unusual, bizarre, strange, weird, unconventional

Example Sentences:

That t-shirt is off-the-wall. Where did you get it?

My father is really off-the-wall because he always cooks dinner at midnight!

Media:

Similar idioms:

1. beat one’s head against the wall
2. be banging one’s head against the wall
3. drive someone up a wall
4. the writing is on the wall
5. burn the midnight oil