| Idiom | Meaning | Example |
| jump to conclusions |
form conclusions before you have all the facts, jump the gun
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If you see a wrecked car and say that the driver was drunk, you are jumping to conclusions.
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| jumping Jehoshaphat |
holy cow, jimminy crickets, wow
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"Your VISA balance is $63,756." "Jumping Jehoshaphat! Is it?"
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| jungle mouth |
smelly breath, unpleasant odor on the breath
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Most people have jungle mouth when they wake up in the morning, but not me!
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| junk |
illegal drugs: dope, acid etc.
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He tried to smuggle junk into Canada. He hid drugs in his shoes.
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| junk food |
snack food, food with little nutritional value
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They eat junk food for lunch - chips, candy and pop.
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| junk it |
throw it away, put it in the garbage
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If a pen is leaking, junk it. Throw it away.
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| junk mail |
advertisements and commercial letters
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On her mail box she wrote a sign: NO JUNK MAIL!
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| junkie |
a person who does junk or drugs; skids
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"What is a junkie?" "A person who uses bad drugs."
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| jury-rig |
make a substitute, improvise
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When we don't have a fuse, Dad jury-rigs one with silver paper.
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| just a smidgeon |
just a little, just a small amount
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"Would you like more cream?" "Just a smidge, please."
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