Hi guys, could you help me with knowing the exact difference between these phrasal verbs butt, jump, break in the conversation. Which, I suspect, pretty much mean the same but slight difference must exist.
They do mean roughly the same thing. Goats and other animals butt with their heads. "Butt in" refers loosely to this image.
"Jump in" implies that you want to enter the conversation suddenly without any invitation from others who are talking. "Break in" implies rudeness or brusqueness, just as "jump in" and "butt in" do.
If you are talking too much for too long a time, one of your listeners might grow impatient and ask you "Do you mind if I break in for a minute?" If you hear somebody ask that question, you should shut up for a while and let the other person speak.
"Degrade"? How? There's nothing wrong with writing or saying "shut up" that I'm aware of. The advice still holds true. If "shut up" bothers you for some reason, then you can replace it with "be quiet", which might not sound so offensive to you.
I'm not sure that "break in" is any more polite than "butt in" or "jump in". Perhaps other speakers consider it more polite, but I don't.