Fish meat 

If it tastes like chicken, keep lickin.
If it tastes like trout, back out.

Last night the boy I slept with had fish meat

Fish meat by ewi.ebs January 24, 2022

meat AND fish

Somebody who is bisexual is said to like both meat (cock ) AND fish (pussy).

Hey Jake! Didjya a hear that Josh likes both meat AND fish?

meat AND fish by Telephony August 2, 2014

as neither fish nor good red meat 

stuck in the middle; not truely one thing or another.

"That's what General Rawson thought you would say,"
Lauffer said emotionally, "as your father's son, as the great-grandson of General Pueyrredon. That you would join us!"
Don't get carried away, Roberto," Clete said. "I'll fly the airplane, if it comes down to that, but I'm not enlisting in your army."
"Actually, the subject of a temporary commission did come up," Martin said. "Would you be willing-"
"I already have a Marine Corps commission," Clete said.
"This would be a temporary commission," Martin said. "It would solve a lot of problems...."
"Would I have to swear an oath? Of allegiance?"
"Yes, naturally. Of course."
"The moment I did that," Clete said, "I would lose my American citizenship."
"That would be difficult for you?"
"Yeah, it would," Clete said without thinking about it. "I don't want to do that."
He happened to glance at Martin's eyes.
And saw in them that be had just closed a door that would never again be opened.
If I had accepted that temporary commission under these circumstances, where accepting it might mean that I would find myself standing in front of a wall with Rawson, Martin, and Lauffer, even if it lasted only 3 days, they would thereafter have accepted me a bona fide Argentine. Now that will never happen.
Well, so be it. I'm an American. I don't want to give thatup.
"That leaves you, of course," Martin said, cordially enough, "as the English would put it, as neither fish nor good red meat"
-W.E.B. Griffin p-591 (Blood and Honor)

as neither fish nor good red meat by J Dan Beck May 30, 2006