ponging

Verb

pong (third-person singular simple present pongs, present participle ponging, simple past and past participle ponged)

1. (Commonwealth, Ireland, UK, slang) To stink, to smell bad.
   • “Give them a drink of this and thy father shall see them as they are. They shall speak from their black hearts.” “Pongs a bit,” sniffed Carrot. “Sure it's not poisonous?”1970, Richard Carpenter, Catweazle, Harmondsworth: Puffin Books, page 174

   Synonyms:

   reek, smell, stink

2. (derogatory, slang) To deliver a line of a play in an arch, suggestive or unnatural way, so as to draw undue attention to it.
3. (intransitive, slang) To invent a line of dialogue when one has forgotten the actual line.
   • […] and the “good old crusted” actor, forgetting the lines of the author, used without compunction to cover his discomfiture by inventing a text of his own–an achievement known as "ponging."2016, Jim Davis, European Theatre Performance Practice, 1750–1900

See all 6 meanings of pong