2yahp chaak 入冊 — [to enter the register] to be sentenced to prison, cf. chèun chaak 出冊.
3yahp chi só 入廁所 — [to enter toilet] to go the toilet to take drugs (OS).
4yahp chóng 入廠 — [to enter workshop] to enter hospital, to be hospitalised.
5yahp chóng daaih sàu 入廠大修 — [to enter the workshop for serious repair] to be hospitalised for a serious illness or injury.
6yahp chóu lùhng 入草龍 — [to enter] to replace some tobacco in a cigarette with heroin (OS).
7yahp dihn yauh 入電油 — [to put in gasoline] to take drugs (OS).
8yahp gwaih 入櫃 — [to put in the cupboard] to hide drugs in the anus, drug addict jargon.
9yahp jaahp 入閂 — [to enter the gate] a prostitute beginning a session with a client (yjh 5.4.2001, 78).
10yahp jó 入咗 — [entered] to be convicted of a crime.
11yahp líu 入料 — to find out what is happening, to get some news or information (ad 21.1.2001, A12).
12yahp lóuh gōu 入老高 — to "fire the ack-ack gun", cf. dáa lóuh gōu 打老高 (OS).
13yahp lùhng 入籠 — [to enter cage] to go to prison (hbd 1, 33).
14yahp ngúk giu yáhn, yahp míu baai sàhn 入屋叫人, 入廟拜神 — [on entering a house, one says a greeting; on entering a temple, one worships the gods] one should follow the customs of the place one is in, "when in Rome, do as the Romans do".
15yahp sàhn 入神 — distracted, in a trance, lost in thought (st 12, 7).