Expressions Only Philatelists Know (What Are Some Of Yours?)

Treskilling Yellow (spelling?)
Bullseye
Invert
Z Grill
Cameos
Missionaries

Sorry if some of these are dupes. (!! Dupes!)

Have we missed any famous stamps or series that have nicknames? (e.g. Chalons, Keyplates, cameos, Double Heads, etc)

Tin Can Mail

Blue Nose

Dismal Brown

serpentine die-cut
tagging omitted
overprint

Lots of famous stamps/series still to go, e.g.:

"1d Magenta' (British Guiana)
'Varnamo issues' (Sweden)
Posthorns ! (Norway)
Wuga provisionals (GEA)
"Post Office" (Mauritius)
Black swan (WA)
Halflengths (Victoria)
Bomba heads (spelling?) (Sicily)
Sitting Helvetia
Strubell (spelling?) (Switzerland)
Britannia
Line-engravedes (UK)
Dragons (Empire of China)
Lady McLeod (Steamships)
Bulls of Moldavia
Scinde Dawk (India)
"La Vervelle" (France)
Sydney Harbour bridge
Roo's
Exports (Mexico)
Uganda Missionaries
Golden monkey (Year of the Monkey, China)
"Vineta provisionals" (Germany)

...oh well, you got me started shermae, maybe not all nicknames, but at least established sjargong
Others to continue...

Changeling
Baby Zep

Precancel terms:

nailhead
split cancel
bureau
local
double line electro
apple greens
lines
bars
silent
dateds
integrals
preper
tombstone

And many more, but that's enough for now.

I know that many of these my non-collecting wife would understand through osmosis from me. Once I overheard her talking with two stampless-others, discussing their husbands pursuits, using some of these same phrases, and all of them had zero interest in collecting.

Engros

En face

Poste Restante

This made me smile, as it is very true....

To the rest of the world, we are just stamp collectors..

I tried to search the thread to see if this has been posted and didn't see anything.

flyspeck or flyspecking

Basil

Basil, shermae has already been flyspecking

I believe these are not mentioned yet (?):
- killer (...but no murderer )
- perforation gauge
- The £5-orange (UK)
- International Reply Coupon
- Maluku Selatan
- Souvenir sheet
- Full pane

Special Printings
and some special terms for them;
SEPICMEN, Double Overprint, Small dotted I, Broken I, Broken C

What is a tombstone??

Pulled Perf