to tease or joke with someone in a playful way
誰かを遊び心でからかうこと (dareka o asobigokoro de karakau koto)
"Don't worry, I was just pulling your leg about the test results."
"心配しないで、テスト結果についてただ冗談を言っていただけです。" (shinpai shinaide, tesuto kekka ni tsuite tada joudan o itteita dake desu)
to express oneself in a way that is easy to understand
to become comfortable in a new situation
to be responsible for something bad that happens
to talk directly about the main topic
to increase interest or support for something
extremely good or impressive