Tip2  —v. (-pp-) 1 (often foll. By over, up) a lean or slant. B cause to do this. 2 (foll. By into etc.) A overturn or cause to overbalance. B discharge the contents of (a container etc.) In this way. —n. 1 a slight push or tilt. B light stroke. 2 place where material (esp. Refuse) is tipped.  tip the scales see *scale2. [origin uncertain]