Didn't he mean "meat eater" in love life? Because such terms as "grass eater" "meat eater" can by applied to different kinds of lovers. Actually people use such terms rather to show two types of lovers. The ones who are shy and passive and the ones who are active and assertive (some even state that aggressive towards women, but I don't want to see Hanyu as this type).
As far as I remember, wasn't it Daisuke who said that you shouldn't tease Hanyu or make him angry when he's concentrating or serious because he'll get really mad?
In Japan, young men these days are criticized as being too passive in everything without eagerness or ambition, including love life, and they are called "Soshoku Danshi", or "Soshoku-kei Danshi", means grass-eating boys or herbivore boys. They don't like to fight and very timid. And it became popular to categorize boys into herbivore or carnivore. Then, girls too are categorized the same, and there are of course carnivore girls

Very positive and active like carnivore animals, especially in love life, towards boys
Actually, the man in the video did not say Yuzuru was clumsy. He said that hypothetically. He asked Daisuke "Could you tell us unknown side or secret of your teammates? The real type of them? For example, Hanyu-kun looks like a prince, but he really is clumsy or something like that?"
Daisuke replied, "Hanyu-kun looks like herbivore, but he really is the opposite. I may look like carnivore, but just the opposite."
"Oh, he is carnivore, really!?"
"Yes, if talking about the type.
'hanaikiga arai (literally means snorty or haughty)' may not the right word, but he is very aggressive, meanwhile I concede."
AlexSaytor, maybe you are talking about this scene.
http://www.youtube.com/watch?v=DDE09X0MDR0
Daisuke is singing in the waiting room when Yuzuru is performing "Hana ni nare".
Daisuke: (Jokingly) How about my going there and singing together? I may get yelled, huh?
Nobunari: Oh, please don't (laughs)
Tatsuki: He (Yuzuru) will get really mad at you! If you fool around while he is concentrating seriously, he will get really uptight!
What have you witnessed, Tatsuki?
