To get something off your chest: idiom   informal C2

to tell someone about something that has been worrying you or making you feel guilty for a long time:

I had spent two months worrying about it and I was glad to get it off my chest.

 have something on your mind/ To be on your mind: idiom C2

to be worrying about something:

Paul has a lot on his mind at the moment.

on your/somebody’s mind

a) if something is on your mind, you keep thinking or worrying about it

 He looked as though he had something on his mind.

 Sorry I forgot. I’ve got a lot on my mind (=a lot of problems to worry about) at the moment.

b) if something is on your mind, that is what you are thinking about

 She’s the type of person who just says what’s on her mind.

To spring something on someone

spring something on someone

phrasal verb with spring verb [ I usually + adv/prep ] UK  /sprɪŋ/ US  /sprɪŋ/

sprang or US also sprung | sprung

to suddenly tell or ask someone something when they do not expect it:

I hope he's not going to spring any nasty surprises on us at the meeting this morning.

To break up with someone

to end a relationship with someone She just broke up with her boyfriend. 

To dump someone

to end a romantic relationship with

often, informal : to end a romantic relationship with (someone) My boyfriend dumped me.

To come out of nowhere

very surprisingly and unexpectedly

: to arise or happen very surprisingly and unexpectedly. That question came out of nowhere.

Couch potato: noun INFORMAL

a person who takes little or no exercise and watches a lot of television.

"it is no good you being a couch potato and having a Dobermann"

To be crazy about something

to be very interested in something or love someone very much: Both my sons are crazy about football. Lorna is completely crazy about her boyfriend.

To be in seventh heaven 

a state of intense happiness; bliss

a state of intense happiness; bliss: We were in seventh heaven in our new home.

To move on

phrasal verb with move verb

UK  /muːv/ US  /muːv/

(EMOTIONALLY)

to accept that a situation has changed and be ready to deal with new experiences:

Since he and his girlfriend broke up, he's been finding it difficult to move on.

To let yourself go

idiom

informal

to allow yourself to become less attractive or healthy:

It's easy to let yourself go when you've got small kids.

To drive someone up the wall

phrase of wall

INFORMAL

make someone very irritated or angry.

"it's driving me up the wall trying to find out who did what"

To bring something up

bring something up

phrasal verb with bring verb [ T ]

UK  /brɪŋ/ US  /brɪŋ/

brought | brought

(TALK) B2

to start to talk about a particular subject:

She's always bringing up her health problems.

  To be used to something / To get used to something

get used to something/someone B1

to become familiar with something or someone:

Eventually you'll get used to the smells of the laboratory.

[ + -ing verb ] I just can't get used to getting up early.

To grow out of something

phrasal verb with grow verb UK  /ɡrəʊ/ US  /ɡroʊ/

grew | grown

(INTEREST)

If you grow out of an interest or way of behaving, you stop having or doing it as you become older:

Lucas says he wants to join the army when he turns 18, but I hope he'll grow out of the idea.

To be the point

idiom. : more importantly. If you drive while drunk, you could lose your license, but even more to the point, you could kill someone.

It figures

is reasonable, normal

idiom. US, informal. : it is reasonable, normal or expected : it is not surprising. It figures that he would be late today. "He's late." "Well, it figures."