@Færd
Valley speak generally fell into disuse
in the early 2000s, and we are probably better off for it, 'cause the "old white dudes" were probably right: Using expletives to stall frequently implies that nothing is to be found in the forefront of your mind, and hence airheadedness, whereas a dismissive whatever is often considered disrespectful in a few ways. The scornful tone of that video is not really helping the latter case.