An acronym for the term „Doublereal for fucking real“. The term is used as a response to something that seems really cool and resonates with you personally.
It's a hell of a maths website. teachers set homework on it because they can't be bothered to make questions themselves. DrFrostMaths has a tendency to never get the answer right. It doesn't know how decimals work or how to round them. It is also a slang term for someone who sucks at maths.
Teacher: You have DrFrostMaths homework Class: Nooooo
Ginger Lord: Yeaaahhh