As a noun, refers to character classes that can take a lot of damage. As a verb, refers to the act of drawing aggro from mobs before other team members strike with their abilities.
A low level character who has been made more powerful by higher level characters, usually by getting stronger armor and weapons than the character would normally have at such a low level.
To rapidly change from one type of ability to another where the abilities overlap momentarily. In DAOC a bard sings a song that gives a buff. By rapidly changing the song several songs will overlap due to the duration of the songs continuing for a short period of time.