Why don't tacos ever win arguments?

This joke is a delightful example of wordplay, specifically a pun, that hinges on the double meaning of the word "fold." When we think of a taco, its very structure involves a tortilla "folding" around its delicious fillings. This physical characteristic is what the first part of the joke plays on.

The humor then comes from applying the idiomatic meaning of "to fold under pressure" to an inanimate object. To "fold under pressure" means to give in, back down, or fail when faced with a difficult situation or challenge. This idiom has been around since at least the late 14th century, referring to yielding to pressure. The joke cleverly takes this very human tendency and attributes it to a taco, creating a silly image of a food item giving up in an argument.

Tacos themselves have a rich history, originating in Mexico long before the Spanish arrival, typically as soft corn tortillas filled with various ingredients. The word "taco" is even thought to have originated from Mexican silver miners in the 18th century, referring to gunpowder wrapped in paper like a "taquito". This joke, however, doesn't delve into that deep history, but rather uses the universally recognized form of a taco to deliver a quick, unexpected, and utterly absurd punchline that tickles our funny bone through linguistic gymnastics.