dally vs chat up

dally and chat up both are verbs.

Word	Noun	Adjective	Verb	Adverb
dally	No	No	Yes	No
chat up	No	No	Yes	No

As verbs, dally and chat up are synonyms defined as:

Other synonyms of dally include butterfly, coquet, coquette, flirt, mash, philander, romance.

dally (verb)	chat up (verb)
consider not very seriously	talk or behave amorously, without serious intentions
talk or behave amorously, without serious intentions	talk to someone with the aim of persuading him
waste time
behave carelessly or indifferently