Tom Sito , en av animatörerna på filmen, bekräftade att det står "SFX" i en intervju med Huffington Post .
What appears to happen:
After Simba kicks up some dust, the word “sex” appears in the sky and your childhood is ruined.
The explanation:
According to Sito, the word isn’t a subliminal sexual message. It’s just a shout out to the special effects department. The animator says, “It doesn’t say ‘sex.’ It says special effects. It’s SFX.”