Top Definition
A square of aluminum foil placed upon a surface to deter cats from walking on it.
After I saw John sitting on the closed lid of the record player I put a piece of aluminum foil on top of it to act as an antimacatter.
by ashburyclowden April 06, 2013

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×