main·line

adjective

/ˈmeɪnlaɪn/

(especially North American English)

verb

/ˈmeɪnlaɪn/

[transitive, intransitive] (slang)

Verb Forms

present simple I / you / we / they mainline	/ˈmeɪnlaɪn/ /ˈmeɪnlaɪn/
he / she / it mainlines	/ˈmeɪnlaɪnz/ /ˈmeɪnlaɪnz/
past simple mainlined	/ˈmeɪnlaɪnd/ /ˈmeɪnlaɪnd/
past participle mainlined	/ˈmeɪnlaɪnd/ /ˈmeɪnlaɪnd/
-ing form mainlining	/ˈmeɪnlaɪnɪŋ/ /ˈmeɪnlaɪnɪŋ/

mainline (something) to take an illegal drug by injecting it into a vein静脉注射（毒品）
- At 18 he was mainlining heroin.他 18 岁时就注射海洛因。