A phrase spoken to one's friend when said friend has done something spectacularly cool and rebellious. Said friend will then respond, "Chk-a-chk-aaahhh..."

Derived from the film Ferris Bueller's Day Off and re-popularized in the post-credits scene of the film Deadpool.
Bill: *downs a trip shot of bourbon, neat*
Mike: "Oom bowmp-bowmp!"
Bill: *belches* "Chk-a-chk-aaahhh..."
by Hellzapoppin' October 11, 2018
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