OT: "Hookah is also called [...] hubble-bubble [...]"
Citation needed.
There are multiple uses of it in Google search results.
"Other common names for waterpipes include [...], and hubbly-bubbly."
They even cite a study entitled "Hubble-bubble (water pipe) smoking: levels of nicotine and cotinine in plasma, saliva and urine". [2]
This rabbit hole goes deep!
[1] http://www.lungusa2.org/embargo/slati/Trendalert_Waterpipes....
[2] Shafagoj YA, Mohammed FI, Hadidi.KA., Int J of Clin Pharmacol Ther 2002 Jun; 40(6): 249-55.
OT: "Hookah is also called [...] hubble-bubble [...]"
Citation needed.