Taken from the book 'Stranger in a Strange Land,' literally meaning 'to drink' but taken to mean 'understanding.' Often used by programmers and other assortedgeeks.
It took me a long time to grok Perl, but now I can read it without going blind!
1. Martain word meaning literally, 'to drink'.
2. Also 'love', 'hate', and much more. To grok means to understand and empathize with something or someone to the extent that the object or person becomes part of ones' sense self.
3. To become one with.