1 definition by Spiff C

Top Definition
A rule from the old days, in which a man could beat a woman with something no bigger than his thumb. It is now used in common language, and most people don't even realise the origin.
According to rule of thumb, you must be this tall...
by Spiff C May 28, 2006

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.

×