"discuss it first" is correct and usable in written English.
It is a way of asking someone to talk about a particular topic before doing anything else. For example, "Let's discuss it first and see if we can reach an agreement."
Adams said his party's ruling body the Ard Comhairle would have to discuss it first.
The schoolmarm insists that they discuss it first at their weekly meeting of the Deep Thinkers Club.
"I think she called someone at the state to discuss it first, but I'm not sure," Ms. Smith said, referring to the state elections office.
But when that risk is imposed upon our children and all of humanity on the planet, is it too much to ask that we discuss it first?" He is not alone in his concerns.
"In most families, decision making is done by the man, but sometimes it needs to be done more equally…if there is a problem and the man needs to make a decision, he might need to discuss it first with his wife.
Do not tell the caller that you need to, for example, discuss it first if you have no intention or need to do so.
Keith finally stepped down as chairman of Hill Samuel after incurring the wrath of his own board in what they considered a merger move too many and a degree of arrogance too far - approaching the United States bank Merrill Lynch about a possible takeover, without discussing it first with his own board colleagues.
McCain says he, too, favors such a step, though Obama discussed it first and does so with more passion.
I discussed it first with close friends and family.
Last night in the State of the Union, Barack Obama made it the centerpiece of his vision for moving forward, dedicating significant time to discussing it first before important issues like education, fiscal management, and even health care.
