Used to describe someone rushing or moving too fast, like the unsuccessful Scottish racing driver

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.

A Coulthard is when someone has a MASSIVE chin that's as big as David Coulthard's.

A Coulthard is someone who is generally very quiet and relaxed, but that has sporradic bursts of energy, at which time they will usually punch someobody, throw something, or maybe even kill those around them. Once said act has been commited by a person, all friends in the vicinity must immediately yell "Coulthard!!"
It also is used when reffering to someobody that is acting like they are cool. Coincidentily, if you put thard after anything that rhymes with "COOL" it sounds awesome.

When you run around a library pretending to stealth kill people because you think your some kind of ninja.