1) Some strange cross between a kid named Luke and Hitler. Often used if someone named Luke has an awkward mustache or other sort of facial hair, or just very little at all.
2) A term used to describe an awesome party. A substitution for the word "rager"
1) Person 1: Man have you seen Luker? His mustache is so dope!
Person 2: Yeah I know! I want to be just like Luker!
2) Person 1: Yo I went so hard at that party last night. It was such a luker it's not even funny.
Person 2: Oh really? Because I saw you hanging out with Luker! That kid is such a returd.