The sentence “I have to admit, the person who came up with this trick has an incredibly high IQ” is a way of expressing strong admiration for someone’s clever idea or solution.
Meaning
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“I have to admit” — You are acknowledging something honestly, perhaps even though you didn’t expect to be impressed.
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“The person who came up with this trick” — This refers to whoever invented, discovered, or thought of the clever technique.
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“Has an incredibly high IQ” — Literally, IQ refers to intelligence as measured by certain standardized tests. In everyday speech, however, this phrase usually means “That person is extremely clever or intelligent.”
The overall message
It essentially means:
“I’m genuinely impressed. Whoever thought of this clever trick must be exceptionally smart.”
The phrase can be used seriously, but it can also be playful or exaggerated, especially when reacting to a surprisingly simple life hack, clever shortcut, or ingenious solution.
