Guam|gwɑːm| [The name of the largest island of the Marianas.] Phr. to clear out, sail for Guam: to sail ‘for some port unknown’. 1881Times 23 June 4/5 Having..docked the steamer..they cleared out ‘for Guam’.1898Westm.Gaz. 7 Dec. 12/1 Sailed for Guam.