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The act of chuckling or giggling after reading an instant message. Most often, the instant message will contain a joke which isn't to the point of being absolutely hilarious, or a joke which barely makes sense.

The chucklol is one tier higher than the lol, which typically results in no laughing whatsoever, but one tier lower than the literalol, which results in a full-fledged laugh.
Flex Plexico: "What do a lion, a zebra, and a bear all have in common?"

Dr. Duncan Steele: "What?"

Flex Plexico: "They're both marsupials."

Dr. Duncan Steele: "Chucklol"
by Leviathan the Massive September 15, 2010
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