It is mostly used as a verb to mean "do badly", "fail", or just generally make stupid mistakes. It can also be used as a noun.
Pamcake is most frequently used when playing video games to describe a stupid action made by someone.
Noun: Jeez, Cheney got a 4 on the reading quiz, what a pamcaker.
Also known as a make out slut .
Friend 2: "That's gross...I don't want to hear about your sex life"
Friend 1: "Oh, we didn't have sex, I just kicked him out when he tried to put his hand down my pants"
Friend 2: "Wow...poor guy. You really shouldn't have pamcaked him like that! :("
(verb) To trample, stampede, or run over a female cheerleader.
(noun) A cheerleader who is suddenly trampled, especially if stampeded by the football team.
Term comes from Season 3 Episode 4 of 1000 Ways to Die.
(noun) Suzy was trampled by the whole team when she did a split in front of the banner, so now we call her Pam Cake.