으면 말다

if not, then never mind

말다 is not doing something, so -으면 말다 is 'then don't'. 싫으면 말고 — suit yourself, don't then — is the heart of it and appears in five of these lines. It can be walking away from a deal, or, aimed at a person, a curt dismissal. One line only looks like the pattern: it contains the noun for speech, not this verb.

Register: blunt, offhand