This fun trend started when boxer Mbavu Destroyer, who's known for speaking his mind, used it to send a message to his rival Majembe before their fight.
In the original video, Mbavu tells a young boy to put a stone on his shoulder while saying weka mawe. The phrase quickly became an internet hit.
In a widely shared video, the senator stands next to a young woman holding a piece of concrete. With a smile, he asks her to say weka mawe, and the crowd cheers. Then, he adds the Gen Z saying ngumi ni mbwekse, which makes everyone laugh.
Oburu, who has been in the news recently for his strong political speeches since becoming the head of the Orange Democratic Movement, seems to be using online trends to connect with younger people.
This latest move shows a different, more relaxed side of the experienced politician, showing he's aware of what's popular.
Kenyans online have been commenting a lot. Many are using laughing emojis and funny comments, praising him for being a good sport and staying up-to-date. Some joked that even though they may not agree with his politics, the senator knows how to stay relevant.
Whether it's a strategy or just for fun, Oburu's involvement in the challenge has once again put him in the middle of the online discussion.