A man shrugs his shoulders, it is used to indicate doubt, ignorance, indifference. Sometimes it is a visual form of indifferent reaction, "whatever". It can also mean I don't know, and I don't care. It is a rather negative expression and is sometimes used to express dissatisfaction and resistance to someone or something.
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?♂️ Shrug
?♂️ Zero width joiner
?♂️ Male sign
?♂️ Variation selector-16