So tall, he seems an unlikely Rabbit, but the breadth of his white face, the pallor of his blue irises, and a nervous flutter under his brief nose as he stabs a cigarette into his mouth partially explain the nickname, which was given to him when he too was a boy.
Rabbit picks up his folded coat and carries it in one hand like a letter as he runs. (1.10)
"At my mother’s? The car’s at your mother’s and the kid’s at my mother’s. Jesus. You’re a mess."
She [Janice] stands up and her pregnancy infuriates him with its look of stubborn lumpiness. (1.34-35)