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1.
For a guy to flirt, date, or attempt any verbal or physical relationship with a girl. Derived from the symbolism of animals using mating calls.
"Where's Ryan? Is he out cooing with his girlfriend?"

"I'm not going to make it to practice today. I'm going cooing."

"Look at Justin cooing with that girl in the parking lot!"
by SouthWP February 09, 2013
 
2.
Why do you have to take sole responsibility cooing.
by Hercolena Oliver August 27, 2009