A somewhat similar question to this one, but in a different language for graphics:
Is there a simple way to draw a squiggly line in asymptote?
It seems that there has not been such a module for squiggly lines, although it is possible (and not very hard) to define one.
A simple implementation:
Leo Liu's answer above led me to the following implementation (I wanted more smooth squiggly lines):
The funny definition of
For piecewise smooth curves it is perhaps better to apply