2sing gāau 姓交 — [surname intercourse] of way of describing someone as a sex maniac, "his name is sex" (since sing gāau 姓交 ("surname intercourse") puns with sing gāau 性交 ("sexual intercourse") (hhdfg).
3sing gāau 性交 — ("sexual intercourse") (hhdfg).
4sing laaih 姓懶 — to avoid responsibility, to deny one's guilt.