in aid of

In aid of means: for the sake of, for (usually placed at the end of a question when quizzing a person about why they have done something).. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on. As a place or proper-name reference it is purely descriptive. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

in aid of means: for the sake of, for (usually placed at the end of a question when quizzing a person about why they have done something).. Register: very informal, often derogatory or vulgar. Avoid in formal, business, academic, or polite writing. Even in casual speech the word can offend and is best left out of a learner's active vocabulary. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.