Definition

1. A time period in which someone is placed in segregation (DSU, The Hole) for a long amount of time. 180's are given for major offenses. It equates to 6 months, and is usually followed by a year in IMU.

Other common sentences are 90 & 120.

Example Usage

Did you hear that Spooky got a 180 for beating that guys head in on the yard a few weeks back?

Origin

Urban Dictionary