bèi​duì​bèi

back to back

背对背 背對背 bèi​duì​bèi
back to back adverb
with backs toward each other; with one's back turned to another person

Both of them lay there back to back.

behind one's back
doing something without the involvement or presence of the parties concerned; privately; also written 背靠背 bèi​kào​bèi

Frequency

Written text
0.348 per million

Cross-References

Variant of

Sources

Frequency data
BCC Corpus (BLCU)