go all the way

go all the way

1. To proceed with something to completion. He's intrigued by our proposal, but I doubt he'll go all the way and approve it.
2. slang To have sex (typically sexual intercourse). Did you go all the way with your date last night?
See also: all, go, way
Farlex Dictionary of Idioms.

go all the way (with someone)

 and go to bed (with someone)
Euph. to have sexual intercourse with someone. If you go all the way, you stand a chance of getting pregnant. I've heard that they go to bed all the time.
See also: all, go, way
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

go all the way

1. Continue on a course to the end, as in The town agreed to put in a sewer but would not go all the way with widening the street. [First half of 1900s] Also see go the distance.
2. Engage in sexual intercourse, as in Her mother told her some boys will always try to make her go all the way. [Slang; second half of 1900s]
See also: all, go, way
The American Heritage® Dictionary of Idioms by Christine Ammer.

go all the way (or the whole way)

1 continue a course of action to its conclusion. 2 have full sexual intercourse with someone. euphemistic
See also: all, go, way
Farlex Partner Idioms Dictionary

go all the ˈway (with somebody)

(informal) have full sexual intercourse with somebody
See also: all, go, way
Farlex Partner Idioms Dictionary

go all the way

in. to copulate; to carry necking all the way to copulation. (Euphemistic. Usually objectionable.) He keeps wanting me to go all the way.
See also: all, go, way
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
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  • blimp out
  • flag
  • flagged
  • flagging
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  • guns
  • garbage
  • cod
  • brassic lint