Green’s Dictionary of Slang

heaven n.

the vagina.

[UK]Farmer & Henley Sl. and Its Analogues.
[UK]Lustful Memoirs of a Young and Passionated Girl 59: I seized hold of his charger and directed it to the portals of my heaven of bliss.

SE in slang uses

In compounds

heaven dust (n.) (also heaven) [dust n. (5)] (drugs)

1. cocaine.

[US]D. Maurer ‘Junker Lingo’ in AS VIII:227: Cocaine is known as C., snow, coke, happy dust, heaven dust.
[US]Monteleone Criminal Sl. (rev. edn).
[US]J.E. Schmidt Narcotics Lingo and Lore.
[US]R.R. Lingeman Drugs from A to Z (1970).
[US]ONDCP Street Terms 11: Heaven [...] Heaven dust — Cocaine.
[US]Post-Star (Glen Falls, NY) 3 Aug. 18/5: There are many slang terms for cocaine [...] big C, blanco, blast, [...] girl, heaven, Mama Coca, [...] pimp, she [...] toot, trains, stardust.

2. heroin; morphine.

[US]Monteleone Criminal Sl. (rev. edn).
[US]Anslinger & Tompkins Traffic In Narcotics 310: heaven dust. Morphine [...] or heroin.
[US]J.E. Schmidt Narcotics Lingo and Lore.
[US]ONDCP Street Terms 11: Heaven [...] Heaven dust — [...] heroin.
heaven-eleven (n.) [SE heaven, since if the shooter throws eleven on the first throw the bet is won]

(US gambling) the point of eleven in craps dice.

[US]J. Thompson Texas by the Tail (1994) 6: Joe, of course, is the lowest point on the dice. Above it are [...] , Eighter-Decatur (three [i.e. combinations]), Quinine (a bitter two), Big Dick (two) and the fielders, Heaven-eleven and Boxcars, which have no bearing after the initial roll.
[US]J. Burkardt ‘Lucky Duck’ Wordplay 🌐 heaven eleven (the winning initial roll of eleven in craps).

In phrases

go to heaven in a string (v.) [orig. applied in 16C to the Jesuits whose faith could bring them judicial death]

to be hanged; thus feel like going to heaven in a string, to be so deliriously happy as not to mind even the possibility of imminent death.

[UK]Greene Second Part of Conny-Catching in Grosart (1881–3) X 82: The quest went vpon him and condemned him: and so the Priggar went to heauen in a string.
[UK] ‘The Great Boobee’ in Ebsworth Roxburghe Ballads (1891) VII:2 274: It [i.e. Westminster Abbey] was a fine sight to see; / Methought I was going to Heav’n in a String. / Like a great Boobee.
T. Ward England’s Reformation II (1710) 47: Then may he boldly take his Swing, / And go to Heaven in a String .
[UK]C. Johnson Hist. of Highwaymen &c. 98: I was condemn’d to be hoisted up by the Neck, and go to Heaven in a String.
to heaven (adv.)

(US) strongly, very much.

[UK]Chapman Widow’s Tears IV iv: fan.: Would to heaven I had seen her! Canst tell whither she went? gia.: Full-butt into Lorenzo’s house.
[US]H. Blossom Checkers 116: I wish to heaven I had ‘gone out;’ instead of getting well.
[US]K. Chopin ‘The Awakening’ Ch. XXIII 🌐 ‘I hope it isn’t Arobin,’ he muttered to himself as he walked. ‘I hope to heaven it isn’t Alcee Arobin.’.
[US]J.H. Griffin the Devil rides outside 316: ‘[H]ave you ever tried to pat [a Frenchwoman] on the behind the next day? Chances are she slapped you to heaven’.
[UK]Wodehouse Mating Season 26: The animal niffed to heaven.
J. Martin ‘Mr. Smutty’ in FFWD Weekly V:49 30 Nov. 🌐 All of which is just the ‘scenic route’ to the following sentiment: by the time you read this, I hope to heaven that Canada has said ‘yes’ to its v. own fleet of mystic flyboys/girls.