KMU
An acronym for the phrase "Keep me updated".
Person 1: "We're thinking about having a party tonight. Not sure what time and place though"
Person 2: "Alright man, kmu on the details"
Person 2: "Alright man, kmu on the details"
KMU
Knock me up.
"Hey babe, we've been dating for a while and I think that you should kmu."