suck off
C1 slang separable transitive
In simple words
Pull something away from a surface using a sucking force. (Also has a sexual meaning in very informal/vulgar language.)
Literal meaning: To suck (draw by suction) something off a surface — pulling it away with a sucking motion.
Meanings
1 C1 neutral
To remove something from a surface or area by applying suction.
"The technician used a specialised tool to suck off the residue from the circuit board."
Grammar: separable
2 C1
idiomatic
slang
(Vulgar slang) To perform oral sex on someone.
Grammar: separable
Usage notes
The mechanical sense (removing debris by suction) is technical and uncommon. The sexual sense is vulgar and inappropriate in formal or educational contexts. ESL learners should be aware of both meanings to avoid embarrassment. Marked as C1 due to the need for social awareness rather than grammatical complexity.
Commonly used with
debris residue dust
Forms
Base
suck off
I/you/we/they
3rd person
sucks off
he/she/it
Past simple
sucked off
yesterday
Past participle
sucked off
have + pp
-ing form
sucking off
continuous
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