Top Definition
1. A person who is both prickly and sarcastic.
2. The least trustworthy plant in the desert.
1. Girl 1: "Yeah, you look 'great' in that dress."
Girl 2: "Don't be such a sarcactus"

2. Cactus: "Sure, that's TOTALLY an oasis!"
Person: "I don't trust a sarcactus."
by Gypsie96 November 25, 2013

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