mainline
US /ˈmeɪn.laɪn/
UK /ˈmeɪn.laɪn/
1.
ligne principale
involving beliefs, methods, etc. that are most common:
:
•
mainline churches
1.
ligne principale
to inject (= put into the body through a needle) drugs directly into the blood:
:
•
Several of her friends were mainlining heroin.