What is Air Hair?
1.
The thinning hair atop a balding man's head that you can see right through.
In the last seasons of his classic sitcom, Jerry Seinfeld's air hair became quite noticeable. So was Nicholas Cage's - before he really went bald and had to wear a piece in his films.
(This term was first coined by Mark Hänser of Boston, MA)
2.
In the same vein as the term 'bed head', what rather unstylistically results from exposing a head of hair to the open air whilst cycling without the use of a helmet, i.e. a random rearrangement of hair strands.
'Boris doesn't wear a helmet y'know'
'Yes and he pays the price by getting air hair'
'He must cycle a lot then'
'What makes you say that?'
'He always has air hair'
See
