The London based hip-hop group are presently promoting themselves in the US, where lead rapper Dappy said he tried to teach the funk band his vernacular.
He said: "I had to tell 'em straight, 'this might not be Shakespeare but this is how I talk, bruv'. They definitely didn't get 'Peng'. Peng means fit, sexy, good looking."
The 'Girls' hitmaker - who stars in N-Dubz alongside singer Tulisa and producer Fazer - said the 'Californication' group's frontman, Anthony Keidis, initially recognised him because of his trademark headwear - a beanie cap.
He added to Q magazine: "Anthony had heard of us, which was amazing. Well, he knew the hat - it's, like, my calling card."
N-Dubz recently revealed they are planning to take a fishing trip together after completing their next tour in April, to help keep their working relationship on track.
Tulisa said: "I love fishing. We're all going to France together and are just going to camp by the river and fish every day and night.
" The trip's more about Dappy and I, to sort of build up a relationship again as cousins.
"You get so caught up at work that you end up losing the family vibe and just hating each other as work colleagues."
Meanwhile, Red Hot Chili Peppers are working on their latest album in Los Angeles.