i don't always whoop but when i do there it is

This phrase seems like a light-hearted, humorous statement. The 'whoop' part implies excitement or celebration. Therefore, it could mean that the speaker doesn't often get overly excited or celebrate, but when they do, they make it very clear or significant.

Without more context, it's hard to pin it on any specific historical or pop culture reference directly. However, the expression likely borrows from the grammatical structure of 'The Most Interesting Man in The World' memes originated from Dos Equis beer commercials. Where the phrase 'I don’t always ..., but when I do, ... ' is commonly used.

Certainly. This phrase could be used when you want to humorously emphasize that you don't often do a certain activity or behave in a certain way, but when you do, it's noteworthy. For example, if you rarely party, but when you do, you go all out, you could say, 'I don’t always party, but when I do, I’m the life of the party.'