Flipping the On Switch is the act of going from lethargy to productivity, but more so in self-improvement than in other ventures, save for buisness. A mental tactic to change one's personality from simpering to being forthcoming and stalwart. Similar to the saying "Kicking it in Gear".
Guy 1: "Ben's performance in the last quarter was pretty bad, but look at him today, his sales are through the roof!"
Guy 2: "Yeap, he must have Flipped the On Switch"
"I really had issues, going from laziness and lieing, making everyone else do things for me and being an all out bum. Then I discovered Flipping the On Switch and I feel great, no laziness, all go-getting ability and nothing but the truth!"
To turn off all emotions and feelings to protect yourself from getting hurt.
Vampire Diaries reference.
I was so hurt by you, but now i've flipped my humanity switch and don't feel a thing anymore!
v. To have a sudden and drastic change of heart.
I thought that chick was easy, but she flipped the switch on me and said she's waiting for marraige.
"Flip my switch" means to turn me on (make me hard) and start flippin (start fucking).
Yo baby girl, you tryna flip this switch tonight?
To lose control; freak out; become enraged and pissed off.
If that douche bag doesn't back up off my girl I am going to flip a swith!
having sex to turn your period on
damn i’m so late, i need some dick to flip the switch