HO noun 3phrases 2 noun3 •Initialism of head office. •Initialism of holy orders. •Abbreviation of HO scale. Phrases with HO give someone the heave-hoTo fire, expel or break up with someone. ho kua bo ho jiakSuperficial; incompetent or having no substance despite appearances, skin-deep; portraying oneself as greater than one actually is; all style and no substance.