Where does this definition of on the up-and-up come from?
This entry for on the up-and-up is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is on the up-and-up a noun, verb, or something else?
In this entry, on the up-and-up is tagged as 2adv..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.