The sounds they make

CBT (11^th of April 2014)

To convey disagreement: they suck in air through lips tightly tucked around their teeth, and in doing so, release the pressure built up around their mouth. They usually repeat this 2 or 3 times in a row.

To get your attention: they hiss at you. I mostly get hissed out by taxi drivers or vendors on the side of the road.