1994 citation
editMoved here from the main entry, since it doesn't support either of the Internet slang senses given. Just seems to be a "roar" sound effect.
- 1994, Airships, Barry Hannah, p. 63
- The privates sang a song they made just for me. Rawr rawr rawr! for Colonel Feather!/ Rawr rawr rawr! (pause, then with gusto) forever!