It's what you say when you want to do something for someone, but they completley fucked it up with a simple freggin' mistake!
(Caution: If used to much, you can be at serious risk of being nicknamed "Token Black Guy" or "Wannabee-nigger"
Teacher: "Alright class, I will give the students that get a 200 on their test a pizza party this friday!"
Teacher: "Come hereshitty guy's name. Aw, I'm sorry, but you have a 198. You misspelled 'New' in New York."
Shitty Guy: "deeeeeaaaaaaaaaaaaaaammmmn!"