What is it called when I poop the dog?

Solution 1:

This is called transitivization, where an intransitive verb is turned around and made transitive. We're also making the subject the object.

This workshop paper from Ellenbas, Mondorf, et. al. at the Catholic University of Leuven (Belgium!) lists a lot of different transitivization types. They don't list an exact match of this one; the closest is the "pseudo-object as transitivizer".

Although new transitivizations such as "poop the dog" or "beep the car" are fun to talk about, there's a very common example staring you in the face. Walk is primarily an intransitive verb but no-one thinks that walk the dog is unusual. But this construction is relatively recent -- the earliest Google books result appears to be in a 1927 issue of The Dog Fancier:

Walk the dog on a loose leash then trot him. but never the gallop, for that means nothing; as a matter of fact it gives a lame dog a chance to cover up his weak action.

Notice that in this usage, "walk the dog" means to guide the dog to go at a certain gait, rather than to merely exercise it ( another one!) as we would use the construction today.

An example of gallop the horse appears in an 1826 issue of The American Farrier:

...if you oblige [the jockey] to gallop the horse, or fatigue him pretty much, (which is commonly done in order to try the creature's bottom), you will in all likelihood discover this defect [i.e., tottering legs]...

The earliest reference to shoeing a horse I can find is an 1871 US GPO book on (what else?) shoeing horses, by John Kiernan.

People can be the object as well as animals:

After Georgie threw erasers out of the classroom window, his teacher marched him straight to the principal's office.