slag - definition and synonyms

verb 

Your browser doesn’t support HTML5 audio

/slæɡ/
present tense
I/you/we/theyslag
he/she/itslags
present participleslagging
past tenseslagged
past participleslagged

phrasal verb

slag off

[transitive]
present tense
I/you/we/theyslag off
he/she/itslags off
present participleslagging off
past tenseslagged off
past participleslagged off
British very informal
to criticize someone or something

I’m not going to start slagging him off without knowing the facts.