tipping

Noun

 * 1) The practice of leaving a tip (gratuity).
 * 2) The act by which something is tipped or inclined.
 * 3) The dumping of rubbish.
 * 4)  A distinct articulation given in playing quick notes on the flute, by striking the tongue against the roof of the mouth; double-tonguing.
 * 5)  A competition where entrants aim to tip (predict) the outcomes of sporting events.
 * 1)  A competition where entrants aim to tip (predict) the outcomes of sporting events.