A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

go all the way • go the full distance
go all the way —
1
. successfully complete smth. not stopping
halfway: The government didn’t go all the way; it restricted
advertising by tobacco companies, but didn’t ban it. 2. (euph.)
have sex (as distinguished from other forms of caressing ):
Unmarried women were not supposed to “go all the way.”
They were expected to remain virgins until they married.
go the full distance —(also: go the distance)
1
. (Sport) continue
running or playing until the end of the race or match: Even
though the race course was in bad condition, all the horses
went the full distance. 2. = go all the way 
1
: We will go the full
distance to ensure customer satisfaction and the highest pos-
sible level of quality. Cf.: go the extra mile — take extra effort;
work longer or harder than expected: Hefflinger is a prime exam-
ple of a coach who is willing to go the extra mile for the
improvement of his team.
go all the way with someone • go half way with
someone
go all the way with someone—
1
. be in complete agreement
with a person: I agree with much of what you say, but I cannot
go all the way with you. 2. (euph.) have sex with a person (as
distinguished from other forms of caressing): Dave had lain
awake running through endless fantasies of going all the way
with her.
go half way with someone —(also: meet someone half way) make
concessions to smb.; come to a compromise with a person:
Maybe you can convince your parents to go halfway with you,
as part of your birthday gift from them.
Note: 
The expression does not correlate in meaning with the
phrase go halves with someone—divide the cost of smth., etc.
with another person: A good idea, if a lot of the books you
need are pricey, is to go halves with a friend.