06/18/2011 at 02:00 PM EDT
She's clearly the mama grizzly's cub.
Inheriting Sarah Palin's sharp tongue for those she feels have done her wrong, Bristol Palin has choice words in her upcoming memoir for Levi Johnston, the father
of their 2 ½-year-old son, Tripp.
In Not Afraid of Life: My Journey So Far
, Palin, 20, rips her ex-boyfriend as "the gnat named Levi Johnston (who's) constantly spreading false accusations against our family" and says he "cheated on me about as frequently as he sharpened his hockey skates," according to the Associated Press.
As for his much-publicized semi-nude Playgirl spread
, she was not impressed. "Puke!" she says, according to the AP, which got an early look at the book coming out next week.
Johnston, 21, is also writing
his own tell-all, Deer in the Headlights: My Life in Sarah Palin's Crosshairs
, to be released this fall.