When you pay a bunch of trumpet-wielding musicians to serenade your girlfriend but she goes home with them when it's over.
Pete: "Dude, my girlfriend went home with this trumpet player after I paid him to serenade her on the street!"
Brad: "Bummer dude, classic Mexican Reversal."
1)After you bust a nut in a girls hair, you roll her up a set of stairs.
2)When you blow your load in a bitches face so hard that it launches her backwards up a flight of stairs.
I went to the gym and had to take a dump. I chose the toilet and provided the greatest Reverse Mexican. Toilet was satisfied and provided me a complementary burp.