Jack: "Yo Jill whatchu doin later"
Jill: "I'll never snitch on daddy"
Jack: ...
Jill: "I'll hold a brick for you, daddy"
Jack: "Aight that's a yumps see you later"
The exact meaning of this phrase eludes explanation. It appears to be a nonsensical, made up phrase that has apparently gained popularity in the 707 Area Code and Milpitas, California.
Loolz. I can make pot smoke with a magnifying glass. On yumps.