Off your rocker

If you are 'off your rocker' (a nickname for a rocking chair), it means whatever you're saying is completely wrong. It most likely originated with senior citizens, who often use rocking chairs.

Example:
-I may be completely off my rocker here, but I think your coworker has a crush on you.
-No, you're not off your rocker! I think so, too.

Friends with benefits

If people are 'friends with benefits,' it means they are friends who have sex. This implies that there are no strings attached -- neither person intends to get involved romantically. They're friends, but that's it. Well, except for the sex part. The problem with this is that one person usually ends up having feelings for the other, and that usually ends things pretty quickly.

Example:
-So are you two going out, or what?
-Nah! Just friends with benefits!

Grounded

If you're 'grounded,' it means that your parents have punished you. You can be grounded from your phone, tv, going out, or whatever else your parents decide upon.

Example:
-Why'd you get grounded?
-I stayed out two hours past my curfew.

Lollygag

To 'lollygag' means to take your time when doing something -- not hurrying at all -- when someone has asked you to do something quickly.

Example:
-We're in a hurry, so please use the bathroom as quickly as possible.
-I know, Mom. No lollygagging!

Drop it

'Drop it' is something you say to end the topic of a conversation. Said as a direct command, it's most likely to be said by a parent to a child. Where the power relationship is closer, it is often asked, 'Can't we please just drop it?'

Examples:
-Mom, please can we stay up until 10? It's Saturday...!
-I've already said no, so drop it.

-Your aunt drives me crazy!
-I know. I'm sorry.
-I mean, she's always...
-Can't we please just drop it? We're almost to her house and I'm sure she's made a nice dinner for us!

Stuffed up

If you are 'stuffed up,' it means your nose is clogged with mucus and you can't breathe very well.

Example:
-Are you feeling any better today?
-No, not really. I'm still completely stuffed up.

Walking on eggshells

'Walking on eggshells' means that you're being very careful with what you say or do because you feel awkward and don't want to offend or anger the other person. The idea is that eggs are very fragile, so you have to be very careful or you'll break one.

Example:
-I always feel like I'm walking on eggshells when I'm at your parents' house.
-I'm sorry. Once you get to know them better and they get to know you better, it'll be much easier.