1. (US) a piece of nasal mucus.
|DN IV:ii 154: slug, n. Ball of mucus in the nose.‘Further Word-Lists – New Hampshire’ in|
2. (orig. Aus. navy) the penis; thus slug slewer, one who watches men in the shower.
|Faggots 321: Think schnitzel, schwantz, sewing machine, slug, spout, [etc.].|
|Aus. Prison Sl. Gloss. [Internet] Slug. Penis. [Ibid.] Slug slewer. A penis watcher in the showers. A voyeur.|
|Vatican Bloodbath 50: We’re not really sure that he is yours anymore, are we Mr Floppy Slug?|
|Lingo 126: [...] tug the slug; beat the meat and punchin’ the truncheon, are all descriptions of male masturbation.|