I hope you find a friendly group.
Knee high to a grasshopper. -referring to when a person was very young, or before birth.
Fart in a mitt.- someone fussing and all emotionally worked up with nowhere to go/ cannot calm down over an issue. Usually nothing very serious except to them.
Go stick your head in a snow bank. - Go cool off/ calm down.
Cool your jets- Calm down.
Couldn’t organize a piss up in a brewery.- Completely useless organizing anything.
When you were just a twinkle in your father’s eye... - I never understood this as a child. Lol Meaning before you were born.
What is good for the goose, is good for the gander.- you have all heard this one. Still pertinent. Same treatment or ramifications for both sexes. Implying men should have to get the same deal as women get. No special treatment.
Don’t get your nighty in a knot.- Calm down, don’t get so worked up.
Take a long walk off a short cliff. - A polite way to tell someone to go to hell or die soon.
Turn the page. - move on from the subject/ issue.
Calling a spade, a spade. - Frank and direct explanation, no sugar coating/ talking around a subject.
*****footing around. -This is not meant as sexually explicit. It means the opposite of calling a spade, a spade. Messing about, avoiding an issue. It can also be said as “no ***** footing around”. ( WC won’t allow the word. It starts with “p”, and can mean a cat. I am not implying anything more).
And Bob’s your uncle. - this definitely confuses some immigrants to Canada in my experience. And ironic too as at one time most of us have had an Uncle Bob. We use to take polls how many actually had an Uncle Bob, short for Robert...Ethnic diversity has changed that though. So it can be very perplexing for some newcomers. It means everything will turn out great. For instance, you tell someone to do certain instructions and then, say “And Bob’s your uncle”. Meaning everything falls into place.
I don’t think I am telling tales out of school. (or, Don’t tell tales out of school).- don’t tell secrets or gossip. My parent’s generation say this frequently. I like the phrase. And smile because it reminds me so much of that generation.
I find the British have wonderful and colourful sayings for everything. I really like,
Suits me down to the ground.- very good, convenient for a person.
Wikipedia has a long list of their idioms. Many well known. Personally I love their word gobsmacked.