unkaputtbar

Etymology
From. The word was used first in 1990 in an advertising campaign. It intentionally violates the grammar rules by using the suffix with the adjective  despite of the fact that this suffix is only used to build adjectives from verbs (e.g. unkaputtmachbar). This made the word sound somewhat funny with the purpose of drawing attention.

Adjective

 * 1)  indestructible, unbreakable