Spray n.
1. meaningless dribble, creative writing, chestbeating, lying or hyperbole spoken or in print loosely related to an activity shared among a group of individuals.
2. a peppering of unsolicited information to one who is active in a shared activity whether or not the sprayer is qualified to give said information
3. comments interjected in a conversation completely unrelated to the subject matter. See also "snaffle"
v. sprayed, spray·ing, sprays
1. to dispense with unsolicited meaningless dribble, creative writing, chestbeating, lying or hyperbole verbally or in print while putting forth an air of authority
2. to pepper someone with unsolicited information when engaged in a shared activity.
3. interjection of unrelated, and often silly, comments to a conversation
Using this definition, I've been spraying for at least 20 years.