mainline

US /ˈmeɪn.laɪn/
UK /ˈmeɪn.laɪn/
1.

garis utama

involving beliefs, methods, etc. that are most common:

:
mainline churches
1.

garis utama

to inject (= put into the body through a needle) drugs directly into the blood:

:
Several of her friends were mainlining heroin.