Definition: a fat person
The origin to this word is not known (or rather- I could not find it).
Why this word?
All obsolete vocabulary sites offer this word, and define it as “18th century English slang used to describe a fat person”. Although all sites give nothing but the definition above, they all seem positive this word actually existed.
Well, it took a while, but I managed to find a caricature dated back to 1773, drawn by James Bretherton, exhibiting a fatter person with the word Jollux proudly spelled beneath him. The drawing is featured with this post and can be found here: http://www.nationaltrustcollections.org.uk/object/1397803
I am not sure this is enough evidence to prove this word’s existence, but hey, at least we’re one step closer than the competitors!
How to use the word jollux in a sentence?
Jollux is simply a slang word for fat. My best advice to you is not to use it in any way that is offensive!
“I can’t believe I just ate the entire pack… I’m such a jollux!”