talk up
talk up {v.}
1. To speak in favor or support of.
Let's talk up the game and get a big crowd.
2. To speak plainly or clearly.
The teacher asked the student to talk up.
Syn.: SPEAK UP.
3. {informal}
To say what you want or think; say what someone may not like.
Talk up if you want more pie.
George isn't afraid to talk up when he disagrees with the teacher.
Syn.: SPEAK UP.
Compare: SPEAK OUT.
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Source: A Dictionary of American Idioms