Green’s Dictionary of Slang

royal adj.

[SE royal, pertaining to a royal family]

[mid-19C+] (orig. US) a general intensifier, often used before so-called taboo terms, e.g. a royal screwing, a royal shafting.

In compounds

royal baby (n.)

[2010s] (Irish) a bag of cans of beer left to cool in a canal.

royal fucking (n.) [fucking n. (2)]

[1970s+] (US) harsh or very bad treatment.

royal George (n.)

[mid-19C] (Aus.) an outsize iron pot used in cookery.

royal shaft (n.) (also king’s elevator) [shaft n. (2)/shafting n. (2)/pun on SE elevator shaft]

[1950s+] an act of extreme harshness or unfairness, as meted out on oneself or to another person.

SE in slang uses

In compounds

royal blues (n.) [the uniform/pills are blue]

1. [mid-19C] the police force.

2. [1970s] (drugs) LSD.

royal game (n.)

[2000s] (S.Afr. gay) an underage boy.

royal order, the (n.) [abbr. royal order of the sack/boot]

[1920s+] (Aus.) dismissal from one’s job.

royal poverty (n.) [gin may be drunk when one is ‘feeling right royal’ but it will lead to poverty]

[mid–late 18C] gin.

In phrases