To feel shy or embarrassed (often when receiving praise or attention); to feel awkward or bashful.
先生に褒められて照れてしまった。
I was praised by the teacher and got embarrassed.
彼は女の子の前だとすぐ照れる。
He gets bashful quickly in front of girls.
カメラを向けられて照れる人もいる。
Some people feel awkward when a camera is pointed at them.