swish
verb (used without object)
to move with or make a sibilant sound, as a slender rod cutting sharply through the air or as small waves washing on the shore.
Used to describe an ongoing action or state that is currently taking place in the immediate present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Municipal trucks likewise are swishing the boulevards clean - riot police are going home.
From The Guardian ● Nov. 6, 2012