Daddy's Home is a phrase used by Barney Stinson, mainly after a successful conquest.
This is also Barney's last line in the entire show.
• In The Yips, after sleeping with Rhonda, he says "Daddy's back".
• In The Rough Patch, after breaking up with Robin, Barney enters the bar and says it to the camera, while everyone feels chills.
• In Hopeless, he uses it in a strip club to introduce himself, followed by introducing his dad as "Grand Daddy is Home.
• In Last Forever - Part 2, when Robin joins the gang for Ted's wedding, he says it about her daughter Ellie. This is Barney's last line in the entire series.
• Who's your daddy?