jumbo

jum|bo /dʒ'ʌmboʊ/ (jumbos)
1 [ADJ] ADJ n
Jumbo means very large; used mainly in advertising and in the names of products.
...a jumbo box of tissues.
= giant
2 [N-COUNT]
A jumbo or a jumbo jet is a very large jet aircraft that can carry several hundred passengers.
...a British Airways jumbo.mum|bo jum|bo /m'ʌmboʊ dʒ'ʌmboʊ/
also mumbo-jumbo
[N-UNCOUNT]
If you describe ideas or words, especially religious or technical ones, as mumbo jumbo, you mean that they are nonsense. (INFORMAL)
It's all full of psychoanalytic mumbo-jumbo.