1. speak up - Verb
2. speak up - Phrase
express one's opinion openly and without fear or hesitation
speak louder; raise one's voice
Source: WordNetIf you want to be seen, stand up. If you want to be heard, speak up. If you want to be appreciated, shut up. Bill Cosby
Politics is a lot like sex - if you want something, you have to ask for it, if they're not doing it right you've got to speak up and show them and if you still don't get what you want, then there is nothing wrong with doing it yourself. Jennifer Beals
I'm very, very blessed. But my safety, my privacy, and my respect are three things that I feel like are trying to be taken away from me right now. As a mother I have to speak up and say something. I have to speak up. Britney Spears
They who in folly or mere greed Enslaved religion, markets, laws, Borrow our language now and bid Us to speak up in freedom's cause. Cecil Day Lewis
If you don't say what you're thinking, you end up lying when you really need to speak up. Banana Yoshimoto
It's better to be silent and thought a fool, than to speak up and remove all doubt. English Proverb