A bridge troll originates from folklore and fantasy where it is depicted as a troll that lives under a bridge and stops travelers from crossing unless they pay a toll or answer a riddle correctly. If the traveler fails, the troll may prevent passage by force, sometimes even killing them. Bridge trolls are often portrayed as grumpy, unpleasant creatures who guard their bridges jealously. In some stories, they accept payment or challenges like riddles or combat to allow crossing. In modern usage, a "bridge troll" can also figuratively refer to someone who is grumpy or unpleasant, especially someone who spoils others' moods or is disruptive. In summary, a bridge troll is:
- A mythical troll living under a bridge from folklore
- A guardian who demands a toll or riddle answer from travelers for passage
- Often portrayed as grumpy or hostile beings
- Occasionally a metaphor for an unpleasant person who spoils things for others
This concept is famously linked with the fairy tale of the "Three Billy Goats Gruff" and appears in various stories and games featuring trolls guarding bridges.
