Depending on context, hast can be:
second person present conjugation of the verb haben (to have): du hast - you have
or
as a noun (capitalised) Hast:
haste
hastiness
rush
rashness
"hast" is old English for the verb "to have". So "hast not" means "does not have".
Du hast keine Ahnung = You have no idea.
Hast Du Geschwister? means do you have any siblings?
What hast thou done means what have you done.
I think it means have?
I assume you mean "du hast mich", this is German, and means "you have me". I don't know how you say you have me in Italian, if that's what you meant.
Awsome digital stuff that works
"Fuchs du hast die Gans gestohlen" "Fox you have stolen the goose"
"Hast" in the poem "Jabberwocky" means to have or possess something. It is an old English word that is used to indicate possession or ownership, similar to "has."
Where did you learn German?
It means " do you have a pencil"
In the sentence was hast du in meinem Zimmer there is a verb missing so it is hard to offer a complete/accurate translation:was hast du in meinem Zimmer getan? = what were you doing in my room?was hast du in meinem Zimmer gesucht? = what were you looking for in my room?was hast du in meinem Zimmer gesehen? = what did you see in my room?was hast du in meinem Zimmer vergessen? = what did you forget/leave behind in my room?