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from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To attack vigorously; -- used of physical or verbal attacks.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To vigorously attack, either physically or verbally.
• verb transitive To consume with gusto.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb hit violently, as in an attack