chuck up the sponge vs throw in

chuck up the sponge and throw in both are verbs.

Word	Noun	Adjective	Verb	Adverb
chuck up the sponge	No	No	Yes	No
throw in	No	No	Yes	No

As verbs, chuck up the sponge and throw in are synonyms defined as:

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

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

chuck up the sponge (verb)	throw in (verb)
give up in the face of defeat of lacking hope; admit defeat	to insert between other elements
	give up in the face of defeat of lacking hope; admit defeat
	add as an extra or as a gratuity