"One way or another" is not an idiom - it means exactly what it says. If you are going to do something one way or another, then you are do whatever it takes. If one way does not work, you are going to try another way.
lag behind one's fellow workers or companions in an activity
It was a custom to plant daisies over the grave of a loved one.
This is not an idiom. Idioms are phrases whose meaning you cannot figure out. This is one word, so it's slang. It comes from shopping carts - if you're so drunk you have to be pushed home in a shopping trolley, you're "trollied."
This is not an idiom. It is comparing one thing to another, so it is a simile. Remember: "AS ___ AS___" means A Simile! It is just saying that something is very black.
"Head over heels in love" would be one idiom.
Every idiom has its own origin. You need to ask a more specific question to get a specific answer.The answer to this one is - sports idioms come from playing sports.
Each idiom has its own origins - you'll have to look up the etymology of every one separately.
lag behind one's fellow workers or companions in an activity
It was a custom to plant daisies over the grave of a loved one.
The origin of the idiom "lost your mind" can be traced to the early 1800s, where "mind" is used metaphorically to refer to one's sanity or mental faculties. The phrase implies that someone is irrational or behaving in a way that suggests they have lost their mental clarity.
One idiom for fighting is "coming to blows". Another is "battling it out".
The idiom "to brain someone" is thought to have originated from the idea of using one's brain as a weapon to strike or hurt someone. It is a figurative expression that means to hit or strike someone on the head with great force.
The origin is in firearms. Old guns used black powder instead of cartridges, and if you let your powder get wet, your gun would not fire.
Those are three unrelated words. An idiom is a PHRASE that seems to mean one thing, but actually means another.
No because an idiom is a phrase that seems to mean one thing, but actually means another. "Copycat" is slang meaning that someone is just copying something that another person said or did.
This is a railroad term. If you fell asleep at the switch, you failed to switch the trains onto the right track and would cause a wreck when the trains collided with one another.
The origin of the idiom "cat got your tongue" is not definitively known. It is believed to come from a retained belief in the Middle Ages that cats could steal a person's breath, rendering them speechless. Over time, the phrase evolved to signify being at a loss for words or unable to speak.