When you frogmarch someone, you make them walk by holding their arms very tightly — pinned to their sides, or twisted behind their back — so they cannot fight or run. Two people often take one arm each and push the person forward. It is a rough, physical way to move someone who does not want to go. Police, security guards, and nightclub staff are the people you hear this about; it is not a gentle word, and families do not use it at the dinner table. English also uses it as a noun: a frogmarch is that kind of forced walk. People sometimes stretch it and say they were frogmarched into a meeting or a choice, meaning they were given no real say — though actually the first meaning is still the body being held, and the stretched use is newspaper colour, not a fully separate sense. The picture behind the word is a frog lying with its legs spread; the held-out arms make the person look a bit like that.