I'm not sure... only think I can think of is "f*ck me running"
FMR stands for Fair Market Rent and RD stands for Rural Development.
FMR Records was created in 1972.
NF stands for Now Following on Twitter.
PM stands for Personal Message. In Twitter this is a direct message.
Short Message Service
'F' could stand for any number of things on Twitter. The widely used 'FF' on Twitter stands for Follow Friday.
Slash Gash and Terror Crew.
OH stands for Overheard. As in "OH:What makes Twitter so popular?"
It was used as part of a competition to win an iPhone.
There isn't anything specific that this could stand for.
Around the internet it usually means, "No problem".
ÜT stands for the Über Twitter Client. The numbers after it stand for the person's GPS coordinates for their location (latitude and longitude).