Best definition
really really stupid and uncivilized indigenous tribe in brazil. participates in tribe rape of any woman under 30 because they believe it is how they were created. take turns hitting each other with clubs and axes to solve common disputes. didnt even invent pants. the word yanamamo is commonly used as an angry expression from all who unfortunately took cultural anthropology at kutztown with schlegel.
“If the yanamamo were so powerful, why didn’t they invent PANTS?”

“AWWW right in the YANAMAMO!”

“You’re a yanamamo!”