pull someone's leg
Meaning: からかう、だます
For Example:
‣ A: Stop pulling my leg! I actually thought what you told me was real.
A: 騙したな～！ほんまのことかと思ったやん。
B: Come on, it's April Fools day!
B: ええやん、今日エイプリルフールやで！
‣ My brother often pulled my leg when I was little, but he was always there for me when needed.
私が小っちゃかった頃、兄はよく私をからこうてたけど、必要な時はいつもそばにおってくれた。
Synonym:
to tease, to joke around