Sharlene Marie Martin, 30, will have the threat of full-time jail hanging over her head for the next two-and-a-half-years after pleading guilty to recklessly inflicting grievous bodily harm.

Martin also asked the court to take into account an additional offence of assault in sentencing.

Bad blood between Martin and the victim began after he accused her close friend of stealing.

The acrimony erupted into violence at a birthday party in March, when Martin attacked the victim outside a Harrison home after he had been in a fight with another man.

Martin jumped on the man and punched and kicked him before biting part of his earlobe off while saying "I f---ing told you I'd get you".

The wound required 14 stitches and doctors were unable to reattach the severed section.

A victim impact statement said the injury still caused the man embarrassment and pain.

He said the disfigurement meant his five-year-old daughter was too scared to hug him and he was forced to undergo a HIV test because Martin was a drug user.

Martin claimed she had "blacked out" after consuming alcohol and drugs and had no memory of the assault.

She said, at the time of the incident, she had turned to binge drinking and daily drug use after a split with her partner and a failed reconnection with her father.

A presentence report rated Martin a high risk of reoffending, but the court heard that danger could be mitigated by drug and alcohol interventions.

Justice Richard Refshauge accepted Martin had shown genuine remorse.

But the judge said violence was a social evil that much be denounced and deterred.

Justice Refshauge sentenced Martin to two-and-a-half-years jail, backdated to take into account time spent in custody.

The judge ordered 10 months of the sentence be served as weekend detention, with the remainder suspended, and the offender be subject to probation for two years form that date.

Justice Refshauge also ordered Martin sign a three year good behaviour order.