شيء لا يُنسى

You usually place this phrase after a noun to describe it. For example, if you just ate a legendary meal, you say أكلة ماتتنسيش. If you are talking about a trip, it is سفرية ماتتنسيش. You can also use it as a standalone reaction. If a friend tells you a wild story, just nod and say, دي حاجة ماتتنسيش (That is something unforgettable).

Use it when you are genuinely moved by something. It fits perfectly after a wedding, a concert, or a deep late-night conversation. It is also great for thanking a host. If you stayed at a friend's house, telling them the trip was حاجة ماتتنسيش is the best compliment. It shows you value the effort they put in.

Avoid using this for mundane or negative things. If you forgot your keys, do not use it sarcastically unless you are with very close friends. It is generally a positive expression. Also, do not use it for things that are actually forgettable. If you use it for a mediocre sandwich, you will sound confusing or overly dramatic. Keep it for the 'wow' moments.

Egyptian culture thrives on hospitality and shared memories. When someone hosts you, they want the experience to be legendary. By using this phrase, you are validating their effort. It taps into the Egyptian love for 'Gada'ana' (nobility/generosity). It is a way of saying the bond created in that moment is permanent. It has been a staple in Egyptian songs and movies for decades.

You can swap حاجة (thing) for specific nouns. Use يوم مايتنسيش for an unforgettable day. Notice the small change to مايتنسيش because يوم is masculine. If you want to be extra, say حاجة بجد ماتتنسيش (Something that truly won't be forgotten). This adds emphasis and makes you sound like a local.