1. as a physical act.
(a) an act of sexual intercourse.
(b) [1940s–60s] (Irish) the breaking out of someone from prison.
(c) [1960s+] an arrest.
(d) [1970s] the act of picking up, meeting, introducing oneself.
(e) [1970s+] a warning.
(f) [1950s+] an act of masturbation; also as used in phrs. below.
2. (Aus.) with (derog.) ref. to a person.
(a) [1900s] (Aus.) a racecourse tipster, presumed to be fraudulent.
(b) [late 19C–1930s] a confidence trickster.
(c) a gullible fool.
(d) [1900s-20s] (chiefly Aus.) a dirty, uncouth, repellent person [? generalized use of Etonian public school jargon tug, a scholar, a clever person, a (too) hard worker; itself abbr. SE tug-mutton, a ref. to their meals but ? also to masturbation. Such figures are disdained by their aristocratic peers].
(e) [late 19C–1930s] a card-sharp [? they tug cards from the bottom of the pack].
[2000s] (US) the masturbation of a partner.
[1950s+] to masturbate.