un-bear-eavable! Posted in U Best definition un-bear-eavable! Adj. Pertaining to that which is bearlike or involves a bear. Adapted from the word unbelievable so that bears can use it. I beat that shit up like honey; it was un-bear-eavable! How satisfied are you with the definition? Looking for un-bear-eavable! meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 102 times.