YOU SAID:
It aint a party until someone drops their pants.
INTO JAPANESE
誰かがズボンを落とすまではパーティーではありません。
BACK INTO ENGLISH
It is not a party until someone drops their pants.
INTO JAPANESE
誰かがズボンを脱ぐまではパーティーではありません。
BACK INTO ENGLISH
It's not a party until someone takes off your pants.
INTO JAPANESE
誰かがパンツを脱ぐまではパーティーではありません。
BACK INTO ENGLISH
It is not a party until someone takes off the pants.
INTO JAPANESE
誰かがズボンを脱ぐまではパーティーではありません。
BACK INTO ENGLISH
It's not a party until someone takes off your pants.
INTO JAPANESE
誰かがパンツを脱ぐまではパーティーではありません。
BACK INTO ENGLISH
It is not a party until someone takes off the pants.
it is unlikely that this phrase will ever reach equilibrium