هذا صديق قديم

Start with ده (this) for a male or دي for a female. It’s a simple subject-predicate structure. You can add it at the start of a conversation. It helps set the tone for the third person. It explains why you might be acting so familiar with them. It’s like giving them a VIP pass to your social circle. You don't need a verb here; the 'is' is implied.

Use it at a wedding when introducing your childhood neighbor. Use it at a cafe when you bump into a college buddy. It’s perfect for those 'small world' moments. It also works in professional settings to explain a close rapport. If you’re texting a group chat, it clarifies who the 'new' person is. It’s a warm, welcoming phrase that puts everyone at ease.

Don't use it for someone you met last week at the gym. That would be confusing or even a bit creepy. Avoid it if the relationship is strictly professional and new. Don't use it if you’ve actually forgotten their name—it won't save you! Also, be careful with the word قديم if you’re talking about objects. For people, it’s about duration, not age or condition.

In the Middle East, friendship is often seen as a secondary family. The concept of عشرة (long association) is huge. People value loyalty over almost everything else. An 'old' friend is someone who knows your family and your roots. This phrase reflects the high value placed on social continuity. It’s a testament to your own loyalty as a friend too.

In Cairo, you might hear صاحبي من زمان (my friend from a long time). If it’s a very deep bond, try عشرة عمر (a lifetime's association). In more formal Modern Standard Arabic, you'd say هذا صديق قديم. If they are like a brother, say زي أخويا (like my brother). Each variation adds a slightly different flavor of closeness and regional identity.