"The standard meaning of happiness, tipsiness and delicious food" is that happiness includes a little drunkenness and delicious food.

The standard configuration of happiness: happiness includes everything that comes with it.

Weiji is a Chinese word that means slightly drunk.

Delicious: food that tastes good.

"The standard combination of happiness, being tipsy and delicious" is an Internet slang. So "the standard combination of happiness, being tipsy and delicious" means that happiness includes being slightly tipsy and delicious food.