Top definition
When a person (most likely a disgruntled student) takes a gun to school with the intention of killing multiple people in said school.
Victor was gonna bust a columbine, but he got caught.
by bigtones July 23, 2004
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug