Role reversal anal...with a strap on.
You did ask 
Wait, that's pegging?
Why is it called pegging I beg you?
Because of inserting a peg. Pretty much.
Like the old fashioned wooden ones probably , they're phallic shaped i guess , more so than modern pegs anyway!
Ah i get it Amy, Americanisms get a bit crazy for me! I was asked by an American guy once if I like "salad tossing" or ot might have been "tossing the salad", had no idea till I Googled, to me it just brought images of 1950s housewives using salad servers and those large bowls at bbq's