1. noun
Paper, usually on a roll, to clean oneself after defecation, or for women, to pat themselves dry after urination.
Syn: toilet tissue, bathroom tissue
2. verb
To cover someones house (and trees and shrubs) with toilet paper or other similar paper product, often as a celebratory event, without the "victims" knowledge. Sometimes also performed as an act of hazing.
"The football team TPed the Smiths house again...this time with paper towels in their trees."
Wikipedia foundation.