A fairy of shampoo is a person who would make you no longer feel lonely just by seeing them. Even if you’re with your sad heart, they make it disappear far away.
A person who searches the Internet for things that they like, comments on them in a positive way, and praises people for posting things that the fairy likes. An Internet fairy is the opposite of an Internet troll.
When you watch fairy tail and notice that everyone in the guild is so nice and friendly to each other, leaving you depressed and questioning whether or not you have any real friends.
A tinkle fairy is presumably an imaginary being that monitors every moment you take a piss, it is mostly known for its limitations, such as 'the amount of times you can shake'. It was made popular from the show Family Guy.
Adam West: *shakes twice*
Tinkle Fairy: Two shakes, that's it...Move along!
Adam West: Oh, why thank you, Tinkle Fairy!