What does "fatphobia" mean?

Fear and/or dislike of obese people and/or obesity.

What is a synonym for "fatphobia"?

Common synonyms include: fatism.

noun

noun ·Rare ·Advanced level

Noun

1
Fear and/or dislike of obese people and/or obesity. uncountable
"Near-synonyms: sizeism, weightism"
2
Fear or obsessive avoidance of consuming fat. uncountable

"What the fuck is fatphobia? What are you saying to me? I'm not afraid of blobs like you."

c. 1980s, fat + -phobia