alive and kicking

"Sometimes when I feel I want to say something ... I just wanted to remind them of the opportunity that's in front of us," Ryan said. "We're still alive and kicking."

The Jets


1. alive and kicking 25 up, 4 down
To be ok. To be on activity. Often used to emphasize the good health of a person, or the recovery after an accident or a trouble situation. Also used for a conversation with a long old friend.

And its an answer for greetings.
where had you been? i handt seen you in a long time

dont worry im still alive and kicking

I heard you had an accident.

-Yeah i did but im still alive and kicking

Urban dictionary

赤ちゃんが生まれたときの言葉だろうか。