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1.
A person, or persons, who hijack the pavement and walk extra slowly knowing that nobody else can get past them. Can be commonly identified by exhibiting the following behaviour:

1. Staring gormlessly at their phone
2. Demonstrating a complete lack of spacial awareness
3. Pushing a pram whilst thinking they're better than everyone else

Pavement pirates can only be countered by walking on the road in order to get round them.
Person 1: Hey why are we moving so slowly?
Person 2: Some pavement pirates have hijacked Bond Street tube again.
by JohnSilver January 26, 2013