Green’s Dictionary of Slang

cockalorum n.

the penis.

1969		J. Plunket Strumpet City 22: ‘I wonder where they buried his [i.e. Daniel O’Connell’s] cockalorum’.
1977		R. Harris Spring Call 40: ‘She’s had more cockalorums than my Uncle Jim’s got pimples on his arse’.
1984		L. Saunders Split Cheeks for Daddy n.p.: [She] reached around behind me to get a grip on his magnificent black cockalorum.
1988		L. Bell Gold Fury (1994) 144: My cockalorum [...] began to pulsate.