nyah-nyahv.
/ˌnjɑːˈnjɑː/, /ˈnjɑːˌnjɑː/, /ˌnjaˈnja/, /ˈnjaˌnja/, U.S. /ˈˌnjɑˈˌnjɑ/, /ˈˌnjæˈˌnjæ/ transitive. To behave in a childishly supercilious or derisive manner towards someone; to taunt someone. Also intransitive.
ΚΠ
1986 Adweek (U.S.) (Nexis) 13 Oct. Two nasty yuppies actually snap towels at each other in a locker room, nyah-nyah-nyahing at each other over who has a better title, a better office, more perks.
1990 Washington Post (Nexis) 23 Mar. d7 The sibling rivalry between New York and L.A. reaches an apex... Mr. Pot is nyah-nyahing Mr. Kettle.
1996 San Francisco Chron. (Nexis) 9 Jan. a18 ‘We are going to fund only those programs we want to fund,’ nyah-nyahed [a] House Republican whip... ‘we're in charge.’
This is a new entry (OED Third Edition, March 2004; most recently modified version published online March 2022).
<
v.1986