I used to call NEMA Bucket lights "Booger Lights" because they were just hanging there like a booger in the nose.  Actually, a lineman gave me that term, and it stuck with me until I joined this site and found the more appropriate "Bucket"

I call the Holophane 200 the "Pudding cup light".

SHOVELED 

SPATULED 

In Australia, We call the Sylvania B2222 'spoonies' this is a Sylvania B2222: https://www.lighting-gallery.net/gallery/displayimage.php?album=5373&pos=3&pid=167710

We call the Sylvania B2223 'flowerpots' this is a Sylvania B2223: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-167771

We call the AEI Optispec 'F****** huge' this is an Optispec: https://www.lighting-gallery.net/gallery/displayimage.php?album=5581&pos=2&pid=161159

We also call the GE led streetlight that looks like a parking meter the 'GE Fugly'

I don`t realley name my fixtures after their disign, but i do give them names! Here are a few: AEL 115: Sam Cobra
                                                                                               Cooper Ovx: Judy (aka Fatty)
                                                                                               Westinghouse Silverliners: Nikki & Dennis (Also the names of my aunt & uncle who
                                                                                               gave them to me)
                                                                                               TCP BW-13: Gomer.

Flat smart eco green gadgetz

Cooper Verdeon: The (...) Shovel

GE ERL1 and ERLH: The seashell
Leotek GC Ecobra: Toilet seat!

I don't know about nicknames, but we have five lanterns that I have given names to:

Our Beta 5 is Johnny, named after the robot in Short Circuit 

The Beta 79 is called Julia, for no special reason 

The Urbis Evolo 2 is called Joanna 

The Philips SRS 201 is called Anton, because of Anton Philips 

And lastly our Gamma 6 is called Gemma, because it sounds like Gamma. 

Sammi names pretty much everything 

Sammi names pretty much everything 

Sounds like me!

i name the mv nema light by my house "blu"

The Westinghouse OV-20 do remind me of a peanut, in fact I once heard these referred to as peanut shaped. The GE 201SA head does remind me of Lego blocks in a way. I never made any nicknames for any lights though.