can of worms

Noun

 * 1)  A complex, troublesome situation arising when a decision or action produces considerable subsequent problems.
 * If someone gets a promotion that might not be deserved, it could open up a whole can of worms with the other employees.
 * 1)  A troublesome situation; an issue whose resolution is difficult or contentious but not necessarily complex.
 * Questioning the decision would definitely open a can of worms.
 * 1)  Any difficult or disgusting task, activity, topic of discussion or subject matter, which would be ideally avoided if at all possible.

Translations

 * Chinese:
 * Mandarin: 棘手的問題
 * Finnish:
 * French:
 * German:, ,
 * Japanese: ゴチャゴチャした状態, 困った事態
 * Maori: unuhanga taniwha
 * Navajo: tʼóó chąąʼ
 * Russian: клубо́к пробле́м, весёленькая исто́рия
 * Spanish:
 * Welsh: tuniad o gynrhon