反射弧绕地球两圈 (fan3 she4 gu1 rao4 di4 qiu2 liang3 quan1) When someone makes a comment and it takes you forever to get it. Literally·The nerve reflex impulse (reflex arc) took two orbits around the earth. Mandarin
(Slang) Jones·To be so unsuccessful with love that it's as if s/he's destined to be single forever. Indonesian
소복소복 (soboksobok)·An ideophone that represents the sound and visuals of something light falling and piling up into a small heap. Korean
Pariban·(If you're a man), women with the same surname as your mother. (If you're a women), men whose mothers' surname is the same as yours. Has an added implication of being the best pairings for marriage. Batak Toba
Disputed Paragrafryttare (lit: article rider)·A person who follows written rules to such a degree that they're seen as rigid and inflexible. Swedish
Disputed Vergüenza ajena·When you're ashamed not because of your own actions but by somebody else's actions. Spanish
Myrornas krig (lit. the war of the ants)·The b/w noise shown on an analog TV set when not tuned into a channel. Swedish
Disputed Preum’s !·Used at the end of a long car ride to determine who will go to the bathroom first. French