(plural melt boys) a m8 who is v cheeky and banterful but also is nice and melty like cheese on toast. Can be used as an insult or a banterous name for a close bud
Jaz: Emily, You're such a meltboy Emily: You too m8, you too
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"