And just in case you don't know, "por favor" is Spanish for "please".
However, once you go beyond your text books and actually start communicating with real people, you quicly learn there's more than one way to say please.
Un cafecito, porfa
A coffee, please
Come to my party pretty please
Please tell me the holiday isn't over
Préstame tu cel para hacer unas llamaditas plis
Loan me your cell please so I can make some quick calls please
A little help please
Remember, all of these versions of por favor are interchangable. I will point out that porfis and por favorcito is along the lines of "pretty please". And "plis" is a bit of Spanglish slipping into the language. It sounds exactly like "please" in English.
Also remember that for formal occasions you'll want to stick with "por favor". It's also possible that one version is a little more regional than the other, but everyone will still understand you.
Don't be afraid to try to try these out with your amigos, they make your Spanish sound just a bit more natural. These expressions are kind of childish and playful, so you don't want to overdo it with them.