basher

noun7

1. •
   One who bashes something, figuratively or literally.

   • Consider the cold-eyed thrush, that springy carnivore of lawns, worm stabber, basher to death of snails. — 1967
2. •
   Before the days of pneumatic rivet guns, the member of a riveting team who hammered the rivet to upset the bucktail to form the field head (see rivet).
3. •
   (informal) One who engages in gratuitous physical or verbal attacks on a group or type of people.

   • He was beaten up by a queer-basher.
4. •
   (slang) A rainproof sheet for sleeping under.

   • Suddenly awake she looked around, startled, it was light, hot, intensely hot and she was sleeping in a shell scrape under a basher. — 2014
5. •
   (slang) A shelter built from improvised materials by a homeless person.
6. •
   (UK, slang) A trainspotter, especially one who likes to travel on specific trains or trainlines.

   • There are bashers and bashers, of course. Most of them, like 'Bob', try to travel as far as possible behind a particular type of locomotive. 'Bob' likes Class 37 diesels. — 2004
7. •
   A kind of small floodlight.