cannons
1.
toplar
a large, powerful gun, usually attached to two or four wheels, that was used in the past to fire heavy stone or metal balls:
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The 5,000-pound cannon predates the Civil War.
1.
toplar
to knock or hit against someone or something forcefully and suddenly, usually at an angle:
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I was rushing along the corridor when I cannoned into someone coming out of a side door.