What does 42 42 mean?

42 42 meaning in Urban Dictionary

An expression made use of, frequently in texting language to express one laughing or that some thing had been funny.Originally based on the mobile telephone keypad from which "Ha ha" is 42 42.Has become increasingly popular in speech with people utilizing it as an adjective. In the place of laughing, to demonstrate that anything is funny, one would say "forty two". Refer to example below.