DDoS /ˈdiːˌdɒs/noun 1verb 1forms 7 noun1 •(Internet) A distributed denial-of-service attack, one that originates from many different (geographically and network topographically) sources, on a network of networks such as the Internet.Some bots help refresh your Facebook feed or figure out how to rank Google search results; other bots impersonate humans and carry out devastating DDoS attacks. — 2017 verb1 •(Internet) To attack by DDoS.On February 9, 2000, web sites such as Yahoo! and CNN were DDoSed off the Internet, mostly by spoofed smurf attacks. — 2003 formsDDOSed · DDoS'd · DDoSed · DDOSing · DDoSing · DDoSes · DDOSes