Take something off: remove something (clothing, jewelry, makeup, a cover from a jar, etc)
外す、はがす、服を脱ぐ、アクセサリーを外す、化粧を落とす、ふたを取るなど

Noriko: Can I wear your jacket? I'm cold.

Tadashi: Sure, let me just take it off. 

ノリコ：あなたのジャケットを着ても良い？寒いわ
タダシ：ああ、今脱ぐよ