Esoteric way of saying your mother. jamoms is mostly used in any reply to a question or a comment by slightly modifying that question/comment.
a: I heard you were at the party last night.
b: Jamoms was at the party last night.
a: Fuck off, get off my dick man.
b: Jamoms should get off my dick.
Weak, lame, clumsy, not slick person.
Expression: "He's a burger put the onions!" is said when encouraging your teammates (in a basketball game) to play hard defense or to go strong (to the basket).
He's such a burger, he approached her to ask her out on a date, but stumbled and fell on his ass.