A weed is a plant out of place.

“I looked at her, with her hair spilled out on the pillows and the warmth of her…”

“if I wasn't a decent woman I'd heist a leg and pee in your ear until it washed …”

“a heck of a lot of things are bound to go wrong in a world as big as this one. …”

“Then he laughed and she laughed. And quivering with the movement of the train, …”