Wiktionary
vb. (present participle of do it English)
Wikipedia
"Doing It" is a song by English recording artist Charli XCX from her second studio album, Sucker (2014). An alternative version of the song featuring English recording artist Rita Ora was released on 6 February 2015 as the album's third single. The single peaked at number eight on the UK Singles Chart. "Doing It" was named "Best New Track" the week of its release by Pitchfork Media.
Charli is seen performing a snippet of the song in a commercial for Pepsi's "Out of the Blue" music campaign, which aired during the 57th Annual Grammy Awards, on 8 February 2015.
Usage examples of "doing it".
Herb asked him what was wrong as soon as he saw him doing it and got zilch, not even the usual vocalizing stuff he does.
Murmuring under her breath, unaware she was doing it, Audrey said, 'Why don't we just stand down?
You know, kind of like Yeah, Seth, you bet, Seth, it sure is wild, Seth and all the time they're doing it, that embankment is slipping farther and farther behind them.
She'd picked up a few of his toys as she spoke, doing it the way people do stuff when they're nervous.