"Stugots" is actually an Italian American truncated version of the Italian words "QueSTO CAZZo" meaning "this dick".
America got mostly southern Italian immigrants, and in the southern dislects, C often becomes G, and especially in the Neapolitan dialect, the terminal vowel of many words is dropped. In Sicilian, they will soften use the -u at the end of a word instead of standard Italian -o.
So we see words like "Capocollo" become Gapagol' or the famous gabagool
America got mostly southern Italian immigrants, and in the southern dislects, C often becomes G, and especially in the Neapolitan dialect, the terminal vowel of many words is dropped. In Sicilian, they will soften use the -u at the end of a word instead of standard Italian -o.
So we see words like "Capocollo" become Gapagol' or the famous gabagool