He said he broke up with his last girlfriend because she was beginning to 'crowd' him. [=she was not allowing him enough privacy and independence]
Her parents are concerned that she's been hanging out with 'a bad crowd'. [=with people who do illegal or immoral things]
He was never one to 'follow the crowd', so we weren't surprised when he dropped out of college to start his own business.
(..) Pretty smart, huh? Pretty smart. I'm ready. Let's do it. Right now, right here. - HONEYBUNNY: Come on. - All right. Same as last time, remember? You're crowd control. I handle employees. I love you, Pumpkin. I love you, Honey Bunny. Everybody, be cool! This is a robbery! HONEYBUNNY: Any of you (..)1994 Pulp Fiction