A term used mostly by gay men to depict something unpleasant, foul, or undesirable. Often replaces words such as stupid, dumb, gay, etc. Ugh, this is so vaginal, I have to work a 9 hour shift today! Those pants are straight up vaginal.
Warning signs such as fear and/or nervousness around other dogs, displays of aggression only under certain circumstances (while on leash, in the presence of food, in the presence of the owner, etc.), or most commonly, over-the-top play behavior can be seen at any stage of the dog's development.
1 Retractable leases could also cause your dog's body posture to send the wrong signal to other dogs. His pulling at the end of the retractable leash may appear to approaching dogs as a sign of aggression, leading to a confrontation between the dogs.  The handle of a retractable leash is bulky.