dar um bolo

The grammar is very simple. You use the verb dar (to give). You can say ele me deu um bolo (he stood me up). You can also say levar um bolo (to take/receive a cake). This means you were the victim. If you are the one who missed the meeting, you 'gave' the cake. If you were left waiting, you 'took' the cake. It is a very active way to describe a social disappearance.

Use it when a friend misses lunch. Use it when a date disappears. It works perfectly for social flakes. You can use it in a professional setting too. If a client misses a Zoom call, you might tell a coworker: O cliente me deu um bolo. It sounds a bit more colorful than saying they were absent. It highlights the personal inconvenience of waiting.

Do not use this for serious emergencies. If someone is in the hospital, they didn't 'give you a cake'. That sounds too trivial. Also, avoid it in very formal legal documents. You wouldn't write it in a contract. It is a social expression. If you actually give someone a physical cake to eat, don't use this! They might think you are canceling your plans instead of being sweet.

Brazilians are generally flexible with time. However, completely failing to show up is still considered rude. The origin is a bit mysterious. Some say it refers to a party where the guest of honor never arrives to cut the cake. Others think it relates to 'fluffiness'—something that looks big but is full of air. Either way, it has been part of the vocabulary for decades. It is a staple of Brazilian social life and soap operas.

You will often hear levar um bolo. This is the most common way to complain. You might also hear ficar a ver navios. This means 'to be left watching ships'. It is a more poetic way of saying you were left behind. But dar um bolo remains the king of social flakes. It is punchy, clear, and everyone understands the sting of it.