ask for trouble vs ask for it

ask for trouble and ask for it both are verbs.

Word	Noun	Adjective	Verb	Adverb
ask for trouble	No	No	Yes	No
ask for it	No	No	Yes	No

As verbs, ask for trouble and ask for it are synonyms defined as:

ask for trouble and ask for it: persist with actions or an attitude despite the probability that it will cause trouble

ask for trouble (verb)	ask for it (verb)
persist with actions or an attitude despite the probability that it will cause trouble	persist with actions or an attitude despite the probability that it will cause trouble