"Rude gestures" refers to physical actions made by someone that are considered impolite or offensive. These gestures are often used to express anger, annoyance, disrespect, or to insult someone without using words. Full definition
Contains prolonged sequences of action violence and a brief rude gesture. (washingtonpost.com)
They're also expressive on the bike, to the point where they had to ban riders from making rude gestures whilst out on track. (wtf1.com)
Talking back, sassy comments and rude gestures by children are a common complaint among parents, and can cause some problems within the family if the behavior is not acknowledged. (verywellfamily.com)