Lunging is a sexual activity in which semen is inhaled into the lungs, giving the word it's name. This is normally achieved during S&M oral sex, where the person giving the treat is being choked. At the last possible moment the choke is released, causing them to breathe in what's coming for them.

Whenever making a congratulatory remark, this is what you say. Made popular by Kamala Harris when she and Joe Biden won the presidency.