1. [mid-17C+] to have sexual intercourse; thus stroking n., sexual intercourse; strokability n., sexual potential.
2. [1960s+] to masturbate; also used in a number of combs., e.g. stroke one’s beef, …one’s ego, ...one’s poker, ...one’s steven, ...the bloke, ... the dog, ...the goat, ...the trumpet.
[1960s+] a pornographic book or magazine.
[1970s] a cinema showing pornographic films.
[2000s+] (US) reassurance, albeit insincere.
[1970s+] a pornographic film.
see under lizard n.
see under beaver n.1
SE in slang uses
1. [1970s+] to die.
2. to collapse.