Is it haram to give the thumbs up sign, or the victory V sign or the devil sign? All of these are hand signs.
Is it imitation of non-muslims?
What about the Facebook like Button, because it is a thumbs up sign

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.

The well-known raising of the two fingers to indicate victory has nothing to do with Satan. It refers to the first letter of the word "victory". It was said that the first person who used it was the British Prime Minister Winston Churchill after the victory in World War II. Then this sign became famous and it is no longer specific to the non-Muslims. Rather, it became famous even among the Muslims, so using this sign is not an imitation to the non-Muslims.

The same thing applies to the sign of ‘like’, which is referred to by pointing the thumb upward. In principle, such matters are permissible.

Allah knows best.