اين مني ما رمت هيهات اعراب

The sentence is asking about the location of something that was thrown. It starts with an interrogative word “اين” meaning where, followed by a pronoun “مني” indicating the speaker, then a preposition “من” followed by a noun in the genitive case “مقدممني”, an interrogative noun, a verb “رمت” in the past tense, and another noun “هيهات” indicating a time period. The sentence is asking “Where did I throw it just now?” with the verb indicating an action that happened in the past and the noun indicating a specific time frame.