Whenever you burn your mouth with food to the point where you can't taste anything else.
Example: Can't Taste it ive got Pie Mouth
an unhygenic or sweaty vagina. A woman may get a grease pie by participating in vigorous physical activity or simply by being unclean by nature.
"whoa, buddy. Don't chase that one. Maria is Italian, she more than likely has a grease pie"
1. A piece of ass that is acquired from a former significant other.
2. Getting some action from an ex-girlfriend without having any intentions to date her again.
Bro: Dude! I totally got a steaming piece of X-Pie from Jessica last night.
Dude: No way. I thought you two were donesies?
Bro: We totally are. I just thought I'd grab an extra slice.
Dude: Noice.
When a girl is on her period and you cum inside her.
I just gave this girl a blood pie