Adjective to describe:
1) a guy who can't seem to understand when a girl isn't interested in him
2) a guy who falls for a girl, and continues to like her, even after she treats him like crap (see green chick)
3) a guy who is completely oblivious about the girl who likes him, because he is preoccupied with being hung up on another girl who is uninterested in him
4) a guy who believes he has found the "perfect woman" but is in fact blinded by physical traits alone that he believes is beautiful, and does not base any of his attraction to the girl on substance or personality
"I don't understand why he's still hung up on her. All she's done is treat him like crap and walk all over him. I guess he's just Grock-retarded."
Girl 1: "I don't know what else I can do. I've flirted with him, I've danced with him, I even gave him my number - and nothing."
Girl 2: "He must still be hung up on that Green Chick. Gosh - sometimes he's so Grock-retarded!"