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1 definition by hahawhydontyoujuststfuandgtfo

 
1.
A term used as a comeback when you cant think of any comeback much like the term "f**k off". Commonly used by many New Zealander's.

Basically like the new "f*ck off"

Whatevs, comes from what ever and Lang Lang is just a random word used to make the whole statement seem more fuller and have more impact by repeating a word.
Adam: Your hair looks ranga (ginger)
Josh: Whatevs Lang-Lang
by hahawhydontyoujuststfuandgtfo October 26, 2010