In English means: "Hit the water, it stays water". It is used to indicate that a person/situation is not going to change, no matter what. e.g. Person 1: "I told him not to smoke in the office for 10 times now!" Person 2: "...and he's still doing it" Person 1: "De2 el mayy, mayy!"
Literal Translation: "Nice body, what's your name?"
This expression belongs to street slang and is commonly used by young men to praise a young woman over her heavenly figure while trying to trigger a conversation. Very close to "Chou Hal Jassad Ya 2assad".
Sample Conversation:
Person 1 is a young pretty lady walking out of a coffee shop to her car.
Person 2 is a young man with not much to do on his free time riding an old BMW. Follows the young lady to her car and puts his head out the window:
Literal Translation: "Nice body, what's your name?"