1. A fabric, as of silk, cotton, or wool, whose pile is more than 1/8 inches (.3 cm) high
1. Expensively or showily luxurious
2. Abundantly rich; lush; luxuriant
The self-designated last name of this goofster:
|Nyjer Morgan, aka Tony Plush (source)|
Anyway, back to the word at hand: plush. It's first attested in 1594 as "soft fabric" from Middle French pluche ("shag, plush"). Pluche is a contraction of peluche ("hairy fabric"), which derives from Old French peluchier ("to pull, to tug, to pluck" - as in, the final process in weaving plush). All this ultimately comes from Vulgar Latin *piluccare ("remove hair"), which evolved from Latin pilare ("pull out hair") based on pilus ("hair").
The adjectival definition meaning "swank" dates to 1927.