n. 1. when the IRS (bean counters; a legume is a bean) come to your house or place of business early in the morning for an audit.
2. SysOp slang. Overnight or over a weekend, company accountants (bean counters) write off equipment which you wanted to use and take it away. Accountants and Computer Operators are historically at odds with one another. see BOFH
It was a veritable leguminous dawn-raid!