I don't know if I am supposed to ask you more, but is there a well-known slang for someone who is presumptuous ?
I 'd like to describe someone who asks you more favor than they should, that seems to know very few limits, they treat you as if you were closer than you really are.
For presumptuous in this situation I can only think of the Italian invadente. Is there something like "invasive" in English? I don't remember off-hand (too long in Italy). Anyway, that's still not slang.