Ocupation: Writer
Life: January 27, 1832 - January 14, 1898
Birthday: January 27
Death: January 14
Well, "slithy" means "lithe and slimy." "Lithe" is the same as "active." You see it's like a portmanteau - there are two meanings packed up into one word.
source: 'Through the Looking-Glass' (1872) ch. 6
topic: Mean, Two, Through The Looking Glass, Two Meaning