Gardyloo! Ai, ai, ai,
the splash below,

look out, look up, a way
with words come a tumbling down,

in to the ditch the
crapulous drunk lay dying in,
brabbling on about this
expurgefactor so sudden of a morn.

Perfect words we never heard,
wake me in their future, crying
"Redeem me, make me plain"

trumpery (n.)
mid-15c., "deceit, trickery,"
from Old French tromperie (14c.),
from tromper "to deceive,"
of uncertain origin
(see trump (v.2),
which has influenced the spelling in English).
Meaning "showy but worthless finery"
is first recorded c. 1600.

trump (v.2)

"fabricate, devise," 1690s,
from trump "deceive, cheat" (1510s),
from Middle English trumpen (late 14c.),
from Old French tromper "to deceive,"
of uncertain origin.
Apparently from se tromper de "to mock,"
from Old French tromper "to blow a trumpet."
Brachet explains this as
"to play the horn,
alluding to quacks and mountebanks,
who attracted the public
by blowing a horn, {their own, you may assume}
and then cheated them
into buying ...."
The Hindley Old French dictionary has baillier la trompe
"blow the trumpet" as "act the fool,"
and Donkin connects it rather t
o trombe "waterspout,"
on the notion of turning (someone) around.
Connection with triumph also has been proposed.
Related: *******; trumping.
******* up "false, concocted" first recorded 1728.

https://www.lifehack.org/articles/communication/24-old-english-terms-you-should-start-using-again.html