first off, second off

first off まず最初に、second off 二番目に、という意味です。1:02 first off, thanks for being a dad.

Instant BBQ For Dads - World's BEST Steak
https://www.youtube.com/watch?v=t8HvCyTCHPQ  0:10 first off, it seems the world believes we're not very smart.
What The World Gets Wrong About America
https://www.youtube.com/watch?v=8q64NU7UV3k  2:37 first off, Nancy Pelosi is a dingbat. まず、ナンシー・ペローシ下院議長はちょっと抜けているところがある。
Top 10 Dumb Things Said by U.S. Politicians
https://www.youtube.com/watch?v=RFUKzAGkZrc  1:32 second off
Cameron Dallas Arrested For Prank Video
参考リンク
http://bridge-english.blogspot.jp/2011/08/blog-post_5559.html  いの一番にを英語でなんと言うか？