Top Definition
abbreviation for No Thread Left Behind.

This is an evolution of the "bump", which brings an old forum thread up with the most recent ones.

No Thread Left Behind is usually reserved as a 'mercy bump' for those topics that never received a reply.
Janedoe: My grandma sent me stockings for Christmas!

* 1 week later*

Johndoe: ntlb
by MetaChimp March 19, 2005
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