much ado about nothing

i received this 5-character message on my phone...

i tried to decipher what the abbreviation could stand for...  ' could not come up with any...

i looked at the keypad to see which ones could be typos...  nada...

ok, give up.  i forwarded it back to the sender asking what his text meant.

the reply?  well, he was driving and must have unintentionally pressed something...