a rule of thumb

Meaning

1. a practical method of doing or measuring sth, usually based on past experience rather than on exact measurement

In the movies · 1

• - Basically, the rule of thumb here is- - Wait. Rule of thumb?The Boondock Saints1999

From the same entry

• bend the rules
• play by rules
• play by the rules
• the rules of the game
• the rule of law
• work to rule
• the exception that proves the rule
• rule the roost
• rule with a rod of iron
• rule out of court
• divide and rule
• let your heart rule your head