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When chatting on the internet you laugh so hard that rather than typing "lol" you randomly smash the keyboard and the result resembles something like hjdskfhkdfkdsj
(alphabetical laughter is commonly seen in a chatroom/private message setting)

guy 1: my dog just ate a box of crayons then left a rainbow in the neighbors yard...

guy 2: hdskjfhsdkfjhdsl
by lIl_Pandora_lIl July 24, 2015
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