Clowning (clown-ing): verb, what Robert Lewandowski did to Gladbach.
"Hey you. Yeah, you, Borussia Monchengladbach. Wanna see what you're in for this season? Come and get it. *giggle* Try again *giggle* One more time? *giggle* Whoooooooop." - Robert Lewandowski.
Bayern Munich added that to their team, and they did it on a free transfer. Good luck, Bundesliga. Giggle.