“Farting bedpost,” please!
I like the German name Posaune for trombone. And I also like cor anglais, which is one of the few instances I can cite of a double lucus a non lucendo.
Skin flute?
Oh, I forgot to mention: the SynthAxe Drumitar.
I always liked Keith Richards’ name for his favorite Telecaster: Micawber. Go here, one page down: The Keith Shrine by Blue Lena-guitar
I found this on the NPR website while cruising for jazz podcasts - Homework: Odd Musical Instruments
Or a meat flute.
From the same family, Duo-Sonic II invokes cool.
Others I am fond of and I don’t think have been mentioned:
Bouzouki
Oud
Kazoo
Explodaphone (not real, but intriguing nonetheless…)
Give us a go on your oboe!
There’s also:
Dying Duck Call (Oboe)
Dying Moose Call (Bassoon)
Kat extinguisher (saxophone; described and used as such by Ignatz Mouse in a 1920 Krazy Kat strip)
Sarrusophones were nicknamed ‘Combat Bassoons’…
Not enough. Need more.