give what for

ain't what it used to was

Is not what it used to be; (expressing nostalgia).

come what may

In spite of anything that might happen; whatever may occur.

do exactly what it says on the tin

To do what is described or what one would expect, with no further explanation needed.

do what

An intensified version of what? or huh?, expressing surprise or lack of comprehension

don't give up your day job

Somewhat sarcastic but usually good-natured advice used to criticise a person's degree of talent (especially in music or other performing arts), implying that they are unlikely to be successful.

get what one asked for

Synonym of get what's coming to one.

give a damn

To be concerned about, have an interest in, to care (about something).

give a fuck

To care; to give a shit.