Skinny is a word that typically has a negative connotation.

It depends on the context and the culture, as words can have different connotations depending on where you are and who you are talking to. However, words that typically have a negative connotation include:

Hateful words like racism, sexism, prejudice, and discrimination.
Words related to violence, such as war, murder, and terrorism.
Words related to poverty and suffering, such as poverty, hunger, and homelessness.
Words related to unpleasant physical sensations, such as pain, discomfort, and illness.
Words that describe negative personality traits, such as selfish, lazy, and cruel.
Words related to negative emotional states, such as depression, anxiety, and anger.
Words that imply dishonesty or insincerity, such as deception, fraud and lies.
It's important to keep in mind that words are not inherently good or bad, and that the context and tone of the conversation can change the connotation of a word.