What is a mugwump? An insult that only Boris Johnson would use

What is a mugwump? An insult that only Boris Johnson would use ************************************************* Heads are scratched, dictionaries consulted and references unearthed in an effort to understand the attack on Jeremy Corbyn ************************************************* Watch more newsletters: Politics News Channel:    / @politicsnews5022   The Leader News Channel:    / @theleadernews6769   World News Channel:    / @worldnews6142   WARNING: RECENTLY I RECEIVED A LOT OF COMPLAINTS SO I HOPE YOU READ THESE WORDS BEFORE WRITING ANY FURTHER COMPLAINTS. Reading daily news is something everyone should do.As you know, there are people who do not do it often, people who want to but do not, I mean they may have a disability. I am here to remind you every time I know of latest news. Of course, I will look for news from sources I believe to be reliable. I also know you hate a robot reading news but that's how I do it. I came here with good intentions and not deserve criticism just for a robot. You should enjoy the fastest news every day from me or ignore it. Thanks. Like & Subscribe to get latest news. Thank for watching!