Very odd, strange, or peculiar; fantastic; bizarre. The definition of outlandish is something bizarre or ridiculously out-of-the-ordinary. ... Abnormal, odd behavior is an example of behavior that would be described as outlandish.

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.

Is outlandish slang?

adjective strange, odd, extraordinary, wonderful, funny, out there (slang), bizarre, fantastic, astonishing, curious, weird, foreign, alien, exotic, exceptional, peculiar, eccentric, abnormal, out-of-the-way, queer, irregular, singular, grotesque, far-out (slang), unheard-of, preposterous, off-the-wall (slang), left- ...