Verb
(slang, vulgar) To fritter aimlessly or distractedly, to procrastinate, to waste time.
Quit fucking around and get back to work!
(slang, vulgar) To fool around.
He was just fucking around.
(slang, vulgar) To have sex with many partners.
After the breakup, she made the most of being single and fucked around.
(slang, vulgar) To horseplay, joke around, behave immaturely or irresponsibly
Source: en.wiktionary.org