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2.
When you talk like a LOL cat.
Drew: I can haz cheezburger?

Dana: Only if you promise not to use Cat Speak around me ever again.
by Katiew567 August 18, 2013
 
1.
Nonsensical or glaringly incorrect grammar usage, usually found in internet typing. The presence of catspeak usually indicates that somebody let their cat use the computer.

Catspeak is used by non-cats, for humorous effect, in cat-themed image macros.
Examples of catspeak:

This is too many breads!

Surrender all your nutrient.
by Anonymous B. Tard April 24, 2007