My mate fancies you
MMFU and wants to know if you'd go out with him.
Absolutely! I was hoping he'd ask.
|BMA||Best mates always|
|ILU||I love you|
|ITILY||I think I like you|
|IYQ||I like you|
|Friendzone||When someone just wants to be friends|
Australians are most likely to use MMFU to mean "my mate fancies you." In this phrase, "mate" means "friend" and "fancies" means "likes." So, in American English, MMFU translates to "my friend likes you."
You might receive MMFU in chat or text messages, from someone whose friend is interested in dating you but is too shy to ask you out themself. YMMV on whether you find that sort of shyness endearing, and how you want to respond to MMFU.