To drop out and Throw in the towel

Throw in the towel and to drop out are semantically related. In some cases you can use "Throw in the towel" instead a verb phrase "To drop out".

Throw in the towel verb - Give up in the face of defeat of lacking hope; admit defeat.

To drop out and throw in the towel are semantically related. Sometimes you can replace phrase "To drop out" with "Throw in the towel", this phrases are similar.