tipping

tip +‎ -ing

tipping (plural tippings)

1. The practice of leaving a tip (gratuity).
2. The act by which something is tipped or inclined.
   • 2013, Peter Andersson, Streetlife in Late Victorian London: The Constable and the Crowd

     Hat-tippings and cap-doffings are of course of a different nature to more elaborate verbal greetings. In etiquette manuals they may be described as incentives to a conversation, but in practice they seem to have been quite ceremonial.

3. The dumping of rubbish.
4. (music) A distinct articulation given in playing quick notes on the flute, by striking the tongue against the roof of the mouth; double-tonguing.

tipping

1. present participle of tip