Botamo Beam (ボタモビーム) is the primary energy wave technique that Botamo uses.
The attack is simply a green energy blast, fired from the hands or ears (beams) in the manga, or via the mouth (balls) in the anime.
Botanmo utilizes the Botamo Beam against Goku when the latter begins moving around to try and work off his food. He also uses it at the end of his battle to try and stop Goku from dragging him off stage.
The technique is named in Dragon Ball Fusions, where it is one of Botamo's special attacks.