1- Abbreviation of "Suck my clitoris". It is an expression girls use in order to ask for a cunnilingus.
2- Also an insult girls use to tell their interlocutor (male or female) to stop bothering them.
Lil Kim - Niggas ain't shit but they still can trick. All they can do for me is suck my clit.
"I had diamonds but I threw them away cause I don't give a fuck SUCK MY FUCK
She rides my dick like it's a merry go round
And I just bust my nut on her"
okay so as a female i say suck my dick frequently and lots of people reply with "u dont have one." suck my dick is actually an expression meaning a more polite version of 'go fuck urself no one cares.'