Good buddy's gf's grandson has been spending a lot of time around them. Good buddy doesn't really care for kids, so he's been getting even with gf by teaching the kid annoying things.
The latest is whenever the kid is around, buddy makes this 'na-na-na-na-na' sound (it's the sound the 'surfer' makes in
a certain Taco Del Mar commercial). The kid adopted it right away.
The kid's driving everyone in his family nuts. He does it
all the time.