PC.net

LIQ

Meaning Laughing inside quietly
Type Acronym
Rank ★ ☆ ☆  Uncommon
Usage Online Only (chat, messaging, e-mail)
Comments

Means the person is laughing, but not out loud, since he or she is at work or another public setting; similar to LOQ and LTMQ.

Updated January 22, 2014
Information from PC.net
https://pc.net/slang/meaning/liq
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