no prob bob 

It just means "no problem". People add "bob" because it rhymes with prob. Earliest usage can be found in the sit-com "Family Matters".

"Thank you, Steven!"
"No prob bob"
"It's.. Lapis."

no prob bob by Shoken April 21, 2016

no prob bob 

an extremely annoying phrase used by zurbans, that conveys mutual trust and sympathy.

Zit 1: "hey Eric can you help me with your magic sword +1? we must defeat the black dragon!"

Zit 2 : "No prob Bob!

no prob bob by heythewhat January 9, 2012