You might shout:
Behind you!
Bear!
Back up!
Booyah!
Base!
Bomb!
Chat with our AI personalities
bingobyeboo
You might shout: Yes Yahoo yoo-hoo Yo!
Gentlemen, start your engines (auto race), go, get out of here and goodbye are things that people shout. They begin with the letter g.
People shout out encore. It begins with the letter e.
"Anyone want to see something pink!" Although you do run the risk of being arrested for indecent exposure.