Often used as an insult. I'll make examples of both but your mom is often used as an insult or compliment about someones mom. Or just straight up making fun of you and/or mom.
Good use:
Friend: Hey man! Your mom is pretty cool!
Person: Thanks, she is the best!
Hockey mom milf is someone that’s hot as fuck, acts like a mom, someone the whole team would bone if given the chance. Doesn’t even have to have a kid yet to fulfill the milf part. Just hot as fuck, attends all her boys hockey games. And only Fucks a select few hockey boys so she isn’t a whore. Hockey mom milfs are usually super caring too.
Chad; Damn did you see Capria at all our hockey games?
Brad; Yeah id fuck she’s so hot and she fucks with hockey??