A MAN who plied three girls with alcohol and drugs before raping them could serve as little as two years in jail.

The Brisbane Supreme Court was told the 47-year-old dad raped the girls, one aged 13 and two 14, on Christmas Day 2011 after forcing them to take speed.

The man, who cannot be named, today pleaded guilty to four counts of rape and providing a dangerous drug to a minor.

The offences occurred at Birkdale, east of Brisbane.

Prosecutor Ken Spinaze said the man forced the girls to consume the drugs after placing them on his genitalia.

He said after the rape the man told the girls they would be "hurt or even killed'' if they told anyone.''

Justice Peter Applegarth jailed the man, a father of three, for five years, saying the offences against the three girls were disgusting and extremely serious.

"Your supplying of methylamphetamine to the three minors (in the way you did) ... is disgusting,'' Justice Applegarth said.

"You said you were in a gang of bikies ... (and) these lewd acts were (induced) ... by threats.''

However, taking into account early guilty pleas he ordered the man's jail term be suspended after two years.

Mr Spinaze said the man was a long-time friend and neighbour of one of three victims, which was why the trio were allowed to visit his home without supervision.

The court was told the man was heavily intoxicated at the time and had forced the girl's to consume the drugs despite their protestations.

"The offending (by the man) was quite brazen because he wasn't alone with these three girls,'' he said.

Barrister Simon Lewis, for the man, said his client had no criminal history and was of otherwise good character.

Justice Applegarth's decision means the man will likely walk free from jail in June 2015.