Wang ho! 

A verbal High five first used in the early 1960 in the UK as a greeting between friends.

Wang ho! hows it going mate?

Wang ho! by Philosopher Joe September 29, 2015

Wang ho! 

Actually the punch line of a joke popular in the UK in the early 1960's, which migrated into the greeting. Pseudo Japanese for 'wrong hole'.

I don't think it would be tasteful to include the joke which ends "Wang ho!"

Wang ho! by Wolstan Wolstan Dixie April 21, 2019