chuck up the sponge vs drop out

chuck up the sponge and drop out both are verbs.

Word	Noun	Adjective	Verb	Adverb
chuck up the sponge	No	No	Yes	No
drop out	No	No	Yes	No

As verbs, chuck up the sponge and drop out are synonyms defined as:

chuck up the sponge and drop out: give up in the face of defeat of lacking hope; admit defeat

Other synonyms of chuck up the sponge include drop by the wayside, fall by the wayside, give up, quit, throw in, throw in the towel.

chuck up the sponge (verb)	drop out (verb)
give up in the face of defeat of lacking hope; admit defeat	give up in the face of defeat of lacking hope; admit defeat
	leave school or an educational program prematurely
	withdraw from established society, especially because of disillusion with conventional values