the combination of thank and you. it is usually used by ppl who want to sound cute or funny. mostly used by girls in a high pitched voice, but can also be used by guys.
Fransheska: Here's your stuff, Stefanie.
Stefanie: Tankuz! =D
The combination of "merhaba", which means hello in Turkish, and "hello", which means hello in English, so overall, this word means hello.
Flora: Merhallo, Fransheska!!!
Fransheska: Merhallo, Flora!!!