It originated in Aberystwyth November 2011 and all started with 'Fume Dog Derulo'
Only some words will work.
If you use the wrong word, or become a dog derulo in the wrong situation, you could end up a)looking like a right tit b)ruin the whole 'dog derulo' get-up.
An example of the words you can use,
Steaming - becomes 'Steam Dog derulo'
Fuming - 'Fume Dog Derulo'
Jealous - 'Jel Dog Derulo
Get turned down by a minger, definite cause for - 'Rejected Dog Derulo'
A few other examples;
Good cook? = a Culinery Genius Dog Derulo
'Sex Panthers social on thursday? I'm gonna be STEAM DOG DERULO!'