A flabbergasterisk! I love it!

I've always pronounced "tilde" till-day, the name of the mark over an 'n' in Spanish that indicates the sound en-yay, as in 'ano' (with a tilde over the n), pronounced anyo. I use ~ for 'approximate' a lot too, probably because I typed a lot of equations in my youth; also still use the less than (<), greater than (>) as well. Great shorthand.

I've always thought that a symbol showing support would look like /\ because I like the idea that two weak reeds leaning together make a strong structure.