An informal term of affirmation derived from the pronounciation of the German word "ja" and the common suffix of Asian forenames "deep", not to be used in the presence of racially sensitive individuals.
Bob: Did you enjoy your weekend?
Dan: Yaagendeep!
Bob: Shit, keep your voice down, that racially sensitve individual is behind you.
mom: go do ur homework
me: yargen flargen blargen!
some assholish yard teacher: go put that away and line up!
me: yargen flargen blargen!
some assholish yard teacher: wat did u say?
me: go to hell bitch!
me walking down the street with some friends muttering yargen blargen flargen when i come near some random person.