ETYMOLOGY
a reduplicated formation on flanting (flaunting)
EXAMPLE
“…An old Doctor of Oxford shewd me Latine verses of his in that flourishing flantitanting goutie Omega fist, which he presented unto him (as a bribe) to get leave to playe, whe hee was in the heighth or prime of his Puer es cupis atque doceri…”
From: Have with You to Saffron-Walden Or, Gabriell Harveys Hunt is Up
By Thomas Nashe, 1596
Lexicophilia 