Wiktionary
shoe tossing
n. The practice of throwing a pair of laced shoes over a power line or telephone line etc
Wikipedia
Shoe tossing
Shoe tossing, the act of using shoes as projectiles or improvised weapons, is a constituent of a number of folk sports and practices. Today, it is commonly the act of throwing a pair of shoes onto telephone wires, powerlines, or other raised wires. A related practice is shoe tossing onto trees or fences.