freakishly or grotesquely strange or odd, as appearance, dress, objects, ideas, or practices; bizarre: outlandish clothes; outlandish questions. having a foreign appearance. remote from civilized areas; out-of the-way: an outlandish settlement. Archaic.

What is outlandish behavior?

If something is outlandish it's bizarre or unfamiliar, far outside the boundaries of expected or normal behavior. Driving around the city in a golf cart and eating spaghetti with pineapple sauce are both examples of outlandish behavior.

What are two synonyms for outlandish?