Green’s Dictionary of Slang

hope v.

SE in slang uses

In phrases

hope-to-die (adj.) [abbr. hope to die if...] (orig. US black)

1. [1960s+] absolute, total.

2. [1980s+] closest, most trusted, best.

In exclamations

hope to my die! (also hope my die!) [hope to die + I hope I may die]

[1920s–30s] (US) a strong excl. used to underline the veracity or sincerity of the speaker’s statement.

hope to tell you! (also hope to shout!)

[20C+] (US) a strong excl. used to underline the speaker’s statement.