A hot-headed mother went on a racist, expletive-laced tirade against an Asian woman aboard a packed city subway — knocking her to the floor over a seat, disturbing video of the incident shows.

The two-minute clip, which was posted to YouTube last week, shows the foul-mouthed mom losing her cool after her young daughter apparently was forced to give up her seat.

“He didn’t get up for me because my daughter is black. He didn’t get up for me to sit with my daughter,” the seated mother shouts to the Asian woman, who also is sitting on a double seat next to two young children on the train.

The Asian woman is then calmly heard telling the angry woman: “Mind your language … be calm.”

“What am I saying wrong?” the mother shouts. “You playing with my kids. If that was your kid you would be OK with it? So f—k you!”

Again, the Asian woman says, “Mind your language.”

“Mind your ass and move it before I kick you,” the maddened mother shouts during the hate-filled rant.

The Asian woman continues to remain in the seat, prompting the mom to say: “Bitch, I will move you off that seat — try me … move from the seat. Move for my daughter.”

Then the mom turns to her daughter — who is seated next to the Asian woman — and orders the child to “push her, push her, push her.”

“Go ‘head, hit my daughter back,” the mom yells at the woman, whose hands can be seen in her lap, according to the video. “Push her off the seat. Go ‘head, bitch!”

The Asian woman then appears to stumble off the seat before the mother gets up and shoves her, knocking her to the floor as she shouts: “Go ‘head, bitch! Move! Move your ass!” the video shows.

“Go ‘head, play with my daughter, bitch. I got a child,” the angry woman continues to shout. “Don’t play with my daughter. That’s my child.”

Now, while standing aboard the train, the Asian woman repeats: “Mind your language.”

“F—k your language. F—k police, bitch! … Y’all speak English? Tell her what she did wrong,” the mother can be heard yelling. “She put my child out a seat. This ain’t your country. Welcome to America.”

The Asian woman responds by again saying: “Calm down. Mind your language.”

“F—k outta here! Gonna put my child out a seat,” the infuriated mom says. “’Cause my daughter’s Spanish and she Chinese, you gonna get up for her to sit down.”

The Asian woman then mutters that the woman is “crazy,” to which the enraged mom responds: “You right! I am crazy!” as she gets up out of her seat.

“Bitch, I’ll spit at you. You got me f—ked up. Welcome to America. We ain’t p—y neither, bitch!” she shouts.

“I put you out a seat. You thought I was playing with you. Play with me. Do something,” the mom shouts before the Asian woman tells her to be “calm.”

“I’m calm ’til you play with my kids. I’m a mother,” she yells. “F—k your calm. Put my f—king child out a seat.”

The mom then glances over at the straphanger recording the clip and says: “What you recording? My d—k in your mouth?” before the video ends.

The clip, which was posted to YouTube by Jose Amatute last Wednesday, had garnered more than 93,000 views by Tuesday morning.

It was not immediately clear what train the incident occurred on or when the incident happened.