This meaning relates to a psychoactive drug known for its stimulant and empathogenic effects, commonly used in recreational settings such as clubs and parties.
ばつをつけるto mark with an Xばつがつくto receive a mark or penaltyばついんバツ印X markばつげえむばつゲームpenalty gameばつがわるいばつが悪いto feel embarrassed or awkwardわるい悪いばつbad markばつのわるいばつの悪いはなし話an embarrassing storyばついち1an incorrect answer (often used in quizzes)ばつをとる取るto remove a mark (as in removing penalties)