Exaggerated or overdone in speech or behavior; sounding or appearing more extreme than reality.
彼の反応はいつも大げさで、冗談だと分かる。
His reactions are always exaggerated, so you know he's joking.
そんなに大げさに言わなくてもいいよ。
You don't have to say it so dramatically.
舞台の演技は大げさになりがちだが、それが魅力でもある。
Stage acting tends to be exaggerated, but that's part of its charm.