that “boy put your lipstick on” bit of the song is supposed to be an empowering call to persevere with Being Yourself in spite of others’ opinions. She’s got an active gay male fanbase so it’s a nod to them as well
She uses it create a parallel with her own situation (ie she is the equivalent to the guy wearing lipstick despite being judged or stigmatised for doing so), which is hilarious and also quite telling - she 100% sees herself as a victim of society’s unwarranted judgment, heroically living her truth