Acid (溶解液, Yokaieki) is a technique used by the Saibamen to poison opponents in the Dragon Ball Z anime and video games. The Saibaman splits open his head and releases acid from it, powerful enough to melt through anything.
It is one of the Saibamen's attacks in Dragon Ball Z: Kyōshū! Saiyan, Legend of the Super Saiyan and Goku Hishōden, Dragon Ball Z: Budokai 2 and Budokai 3. It is one of their Blast 1 in the Budokai Tenkaichi and the Raging Blast series, and returned as an offensive technique in Dragon Ball Z: Ultimate Tenkaichi.