thin on top

Meaning

1. without much hair on the head

   He's starting to get a little thin on top (= he's losing his hair).

In the movies · 2

• Gettin' a bit thin up top there, Hank.A Simple Plan1998
• WHAT REALLY HAPPENS IS THAT THE $9 BILLION IS SIMPLY CREATED OUT OF THIN AIR ON TOP OF THE EXISTING $10 BILLION DEPOSIT.Zeitgeist: Addendum2008

From the same entry

• be skating on thin ice
• disappear, vanish, into thin air
• have a thin time
• out of thin air
• the thin end of the wedge
• a thin skin
• thick on the ground
• walk a fine line
• spread yourself too thin
• through thick and thin
• wear thin