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Etymology 1Edit

Generally attributed to whitewater kayaking afficionados in the eastern United States in the mid- to late-1970s. The term derives from the onomatopoetic sound that a kayak makes when it lands on the water after “ski jumping” the waterfall forming the backwash.


boof (plural boofs)

  1. A “jump” over hydraulic backwash in a high-gradient mountain river, an action analogous to a skier jumping a cliff.

See alsoEdit

Etymology 2Edit


boof (third-person singular simple present boofs, present participle boofing, simple past and past participle boofed)

  1. (transitive, prison, slang) To conceal (a prohibited item) in one's rectum.

Etymology 3Edit



  1. (colloquial) The sound of a blow or collision; wham.
    • 2011, Paul Theroux, Dark Star Safari: Overland from Cairo to Cape Town
      The barman vaulted over the bar and hauled him off and went boof! – right in the Boer's chest, and down he went. As he settled on the floor we ran upstairs.