Wiktionary
suck it
interj. (context idiomatic vulgar English) a rebuke or dismissal
Wikipedia
Suck It
Usage examples of "suck it".
Ernest wants to try pouring a bottle of wine into his rectum and letting Ann suck it out again, but Sid argues him out of it .
If I can get a connection on it I can suck it out in about ten minutes.
When it was boiled, she took it up and gave the baby a little, dipping a cotton rag in the milk and letting the baby suck it.
After I shave Torri's pussy she lies on her back on Paul's futon and spreads her legs while I finger her and suck it off, sometimes licking her asshole.
You can put an Everlasting Gobstopper in your mouth and you can suck it and suck it and suck it and suck it and it will never get any smaller!