be in the club —(coll.) become pregnant (also: be in the pudding club):
- When the doctor told me I was in the club I told him he was daft—that I’d never—well, you know.
join the club—
1. (also: join the crowd) is used to tell that one has already had a similar, usually unfavorable, experience:
- You think you’ll never be out of debt? Join the club.
2. be one of a number of people sharing smth. in common:
- Men knew she was available to anyone who cared to take her out for an evening. Peter had avoided joining the club.
3. = be in the club:
- It was not long into my girlfriend’s pregnancy that I realized it was not going to be fun. Between the time she “joined the club” and us knowing about it, she went decidedly mad.