"Wow, Jack is being such a pussy he can't stop his eyes from watering!"
By Eloisa
Stop Being A Pussy
the Phrase "stop being a pussy" is a slang term describing the actions and whining sounds that cats can create. These utterances of the feline members can be found to be annoying as is the constant actions of rubbing its body against yours.
In this context, being a pussy is to in fact to be whining and annoying.