Like lol'd, but more of a suppressed and subtle laugh; Chuckl'd. A past tense version of chuckle.
Term first coined by King Tonz in 2012.
Jack: '...so I threw a rock at the guy...'
Joey: 'haha, chuckl'd.'

King Tonz: 'I chuckl'd at your misery.'
by King Tonz November 8, 2013
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