According to good old Wikipedia, aerofoil is an aircraft-related type term, supposedly referring to the shape of a wing/propellor/rotor, so I'm guessing aerofoil is a nickname for a certain bold eyebrow shape? Some styles of dramatic eyebrow shape I personally find quite cool, especially on alternative-styled people, others I think look a bit silly.
Ok if it's room 101 time.
people who like to be negative just for being negative sake (lots on this site)
Sullen Faeces springs to mind. For an example (of which there are many) you only have to look at his 'If nobody understands the question, then it must be a stupid question' post in this thread. A troll whose sole purpose on here, it seems, is to ridicule and belittle.