a lol sack is a fictional organ that is used to define how funny something was, it is the most funny a thing can be. you would use this term in situations where you laughed so hard that your balls (or stomach ) started to hurt.
that was so funny, it felt like someone punched me in my lol sack!
by RolyatEornom June 24, 2011
A general term of amusement.
John: I tripped over my Pokeball the other day.
Robert: Lolsacks.
by XenoPistach March 25, 2008
A general term of amusement.

John: I tripped over my Pokeball the other day.
Robert: Lolsacks.
by XenoPistach March 27, 2008

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