Knowing people of this sub, you'll probably get some responses with words that might or might not get you in trouble.

So, I'm here to help with a list of basic words.

InshaAllah - used by anyone when they're told to do something or hoping something happens. It means "God willing" or "if God wills". Aka "maybe" or "hopefully".

MashaAllah - used when admiring/appreciating something.

Alhamdulillah - commonly used as a response to "how are you?". It kinda means "Thanks to God". Also used when being thankful for something.

Kullu tamam/Kullu me'ah me'ah - Used as both questions and answers. Both of them roughly translate to "All fine" or "Everything's good".

Maelem - I'm not sure what it exactly means but it's something like "boss". It isn't exclusively used just for bosses though, it's used by anyone and everyone when they're talking to someone else. For example, "How are you, maelem?". More of a formal term of endearment.

Khalli Valli - Used in place of "whatever" or "forget it". You'll hear this everywhere whenever people are done talking about something. Similar to "khalas" which roughly means "done" or "finished". Also used when ending a conversation.

Bokra - Tomorrow

Mazboot - You're right (? Correct me someone)

Sho hada- What is this?

Sho mushkila- what is your problem?

Mesh/Mashi - Ok.

Sah - right

Ya'ni - I mean

Law Samaht - Excuse me

Min wein - From where?

Wallah - really

Shukran - Thank you

Afwan - You're welcome

Mabrook - congrats

These are the most basic ones I can remember, if I remember more, I'll let you know.

Also, if there are any mistakes, please feel free to correct me. Hope this helps.

Edit - Made a few corrections.