Wikipedia vandalism is an act of course where the user will add an irrelevant comment, remove all the text, replacing the text, adding links etc, which have nothing to do with the original article.

the act of being “sued” for a non-existing crime by a screaming 10 year old on Xbox live

Verb; Dylan Vandaled, Gaylan Vandal

The process of sticking a mans penis inside of the females belly button, then fucking it.

And if it is homosexual it is Gaylan Vandal

This phrase is used to describe someone who like to fuck pussy hard and rough.

All penetrative sex displays some level of vandalism to the woman crotch, as over time the excessive stretching of the vaginal walls will cause the muscles lose stability and hang like sleeve of wizard. but this will take many years.

Although a "Vagina Vandal" with their extreme hardcore porn style intercourse and hours of thrusting achive results that may actually cause physical and possible
psychological trauma to the woman and her vaginal area. after as little as one or two heavy sessions.

Drawing, writing or doodling on yourself. (hands, arms, legs)
Drawing aimlessly on yourself.

An enlarged crayon (usually two or tree times larger then a average crayon) that can be written on almost any surface, commonly used among graffiti writers vandalist.

Wood, Metal, Plastic, Glass, etc..

Also it can be used on almost any surface even if wet or oily.

What high school students have had to resort to in computer lessons when the school filter blocks all the game sites.