Wam could mean anything, but the definition I was looking for is the abbreviation for the sexual kink known as "
Wet And Messy". Apparently it's been around for quite a while (a while in my POV is two decades).
Basically the premise is that some people (me) find it erotic when girls cover themselves or play with certain substances that have satisfying
tactile properties. For me, it's anything with a thick,
viscous and slimy consistency, such as honey, simulated mucus,
nuru gel, or slime itself. This kink is most (in)famous for using food substances, but this is entirely optional (I prefer non-food substances, with the exception being confectionary stuff like syrup or whipped cream).
This kink can be depicted with or without any additional sexual acts being performed. I personally find it really erotic when the performer
wallows and slides around in the substance on a flat surface.