A slang insult for a silly, foolish, or worthless person; also another name for the dill plant.
A compound insult combining 'dill' (as slang for something foolish) with 'weed' (suggesting something worthless). Emerged in American slang in the mid-20th century.
What's hilarious is that this insult accidentally works both ways—you're calling someone both a silly person AND an annoying plant, but dill is actually delicious and useful, making it a terrible insult scientifically!
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