Trawny
A nonsense word that has no meaning, but can mean anything you like. Can be altered to be a verb (to trawn), an adjective (trawny), a noun (trawn) or an adverb (trawnily).
"Sammy, you're such a trawn."
"Stop trawning around!"
'He ran trawnily.'
"Ugh, this is sooooo trawny!"
"Stop trawning around!"
'He ran trawnily.'
"Ugh, this is sooooo trawny!"