malicious mischief

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Willful or wanton destruction of another's property.

Wiktionary

1. n. law The willful, wanton, or reckless destruction of the personal property of another occasioned by actual ill will or resentment toward the owner or possessor of such property.

GNU Webster's 1913

1. n. (Law) Malicious and willful destructionof or injury to the property of others; -- it is an offense at common law.

WordNet 3.0

1. n. willful wanton and malicious destruction of the property of others