不辞而别

Explanation: Remarks: leave; Gender: parting. No leave left. Or quietly slipped away. 　　Usage: Partial official; as predicate, object, adverbial; described leave without warning 　　Source: Lao She, "no problem problem": "So, we want to leave without saying goodbye." 　　Examples: So, we want to leave without saying goodbye. (Lao She's "not a problem of the problem") Thesaurus:  Luohuang make away/off with, Rat across street everybody to shout Antonym Group:  gate-crasher, muster up courage head, Rush Yong Jin, gatecrasher