J

Jack of all trades and master of none. 样样皆通，样样稀松。 (来源：英语交友 http://friends.englishcn.com)

Joy and sorrow and next door neighbours. 欢乐与悲伤是近邻

a Judas 犹大（叛徒）

Judas kiss 死亡之吻

Judge not according to appearance. 人不可貌相

jump from the frying pan into the fire 出了泥坑，又进火坑

jump the gun 偷跑，提前行动

jump the queue 插队

junk food 零食

Justice has long arms. 天网恢恢，疏而不漏