This term is used when one male wants another male to check out a fine ass chick in the vacinity while being inconspicuous. The male will state "Steve Called at _ O'Clock. The _ will be filled in with a number corresponding to the direction of the female like the hour hand on a clock.
"Steve Called at 3 O'Clock."
"Check out the Fuckin Babe to my right."

"Steve Called at 6 O'Clock."
"Chech out the fine ass bitch behind me."

"Steve Called all day long"
"We are surrounded by some fine ass bitches" (very good)
by ASU Aviator September 13, 2008