1. Pussy (in this context) = weak, over-sensitive, man, in other words a "wuss" or a "big girl's blouse". So, the meaning here is "Stop being scared and be men!". It can be used to refer to women, but is not usually.
2. They left.
3. to suck at something (slang) = to be bad at something
4. Same thing
5. Stop your car
6. us = me (slang)