Wiktionary
suck cock
vb. 1 (context vulgar English) To perform fellatio. 2 (context idiomatic vulgar English) To be of poor quality
Usage examples of "suck cock".
She shouted back, 'If you think for one minute I'd screw and suck cock in your place, Madam, and give you a profit, you're badly mistaken!
If I want to suck cock, I'll fucking suck cock and if you won't employ me Fox will!
You're gonna cook, clean, wash me, suck cock, fuck, and kiss my feet.
Either Nanashub goes down to the orbital right now, or yours truly never gets to suck cock again, you get me?