Beetlejuice just about jumped out of his skin when Lydia suddenly shouted next to him. The car gave a jerk, as Adam, still jumpy, was clearly also startled. Barbara's mouth hung open for 2.5 seconds before she recovered. 

"Delia, please watch your language, hun," She said in that sweet, mom voice. "Adam and I don't like cursing."

"Oh my [i]god[/i]," Beetlejuice groaned. "Could they [i]get[/i] any more lame? Fuck is a verb, not a 'curse word'." 

Well, it was easy to see where she got it from.