[no obj] : to move your arms and hands especially when speaking in an angry or emotional way ▪ He was gesticulating [=gesturing] wildly during his speech.
— ges·tic·u·la·tion/ʤɛˌstɪkjəˈleɪʃən/noun, pluralges·tic·u·la·tions [count] ▪ strange gesticulations [=gestures] [noncount] ▪ communication by means of gesticulation