Your friend's pissed, lost and scared and just asked you for a lift but your girlfriend's telling you to blow him off. What do you do? Ditch her of course.
This trope refers to the concept of putting friends before a romantic interest, with the idea that love is fleeting, but True Companions are forever.
A sub-trope of The Bro Code.
"Chicks before dicks" is picking up steam as the feminine version. "Sisters before misters" works too. "Pals before gals" is the G rated version.
Compare with True Companions
Ouran High School Host Club: Quite literally when Kaoru gives up on his romantic feelings for Haruhi so that his brother, Hikaru, can realise his feelings for her so that he might learn to grow to be a little more independent.
Soul Eater: Soul and Black Star. Though not just hoes; anything really.
In "Jimmy Olsen's Wedding", Jimmy dreams about being married to Lucy Lane, only for her to keep harassing him about his bond with Superman at every turn. When Jimmy awakens, he essentially tells her that if it comes down to a choice between her and his pal, she can expect to lose.
A Boy and his Dog: When Blood is dying from thirst and starvation, Quilla tries to convince Vic to abandon him. Instead Vic kills and cooks Quilla for Blood's lunch; it doesn't get any more bros before hoes than that.
In Transformers: Sam's friend protests ("Bros before hoes!") to no avail as he is ejected from the car to make room for Mikeala.
In Open Season it is phrased as the PG-friendly "bros before does."
Con Air: While Cyrus's gang refuel the plane, one of them is sent to hide the transponder on another plane. In the hangar he meets a female mechanic and is so busy talking to her that he misses the take and is shot while trying to catch up, explicitly dying because he chose to stay with the woman instead of returning to the bros.
In How to Stop Being a Loser Ampersand shouts the phrase to James at the airport, but it's the cheese sandwich that saves the day.
In New Jack City, drug king Nino Brown makes with his friend Gee Money's mistress when she offers herself to him. When Gee Money later voices his anger at Nino for taking everything for himself, Nino dismisses the girl as a skank and says that Gee means infinitely more to him.
Jeremy references this trope by name in Duumvirate when realizing his servant is far more valuable to him than his girlfriend.
Inverted in Gathering the Enchanted. Bannor's best friend Daniel ditches him so he can date Bannor's ex, Becca. And this is all going on while Bannor is being ostracized by those around him because of the event where he saved Daniel and Becca's lives from a movie theater shooting. Ouch.
Invoked/referenced in Romance of the Three Kingdoms where Liu Bei stops Zhang Fei from committing suicide over a failure with "[b]rothers are as hands and feet; wives and children are as clothing. You may mend your torn dress, but who can reattach a lost limb?". Though this could also be credited with how he 'justified' tossing the rescued Liu Shan to the ground just because it endangers Zhao Yun...
Sheldon: Howard has informed me that my allegiance be to male comrades before women who sell their bodies for money. Leonard: Are you sure he didn't say 'bros before hos'? Sheldon: Well, I changed the phrasing so as not to offend the hos.
In another instance Sheldon's World of Warcraft account was hacked and they managed to trace the perpetrator. At the time Leonard was dating Raj's sister, Priya, and while everyone was set to track down their foe, Leonard was hesitant about stiffing Priya two nights in a row over this thing. This leads to Raj saying "Come on, Bros before ... my sister!"
There's also the episode in which Sheldon tries to shove Amy out of his life (fearing a Relationship Upgrade) by simply ignoring her... because he's Sheldon, he even takes down one of the street numbers of their building so she can't forward him any letters, and when Leonard asks him what they would do about the mailman, he tells him that he explained the whole situation to the mailman and...
Sheldon: He was actually quite sympathetic. His exact words were: "I got your back, Jack. Bitches be crazy."
On 30 Rock when Jack wants to put his girlfriend's needs ahead of company's he mentions he can't because the company has a strict "B's before H's" code.
Ted pulls a non-gendered version in How I Met Your Mother, dumping his girlfriend Karen after she told him he couldn't be friends with Lily anymore — this is even after he got into a huge fight with Lily because she tried to underhandedly break him and Karen up.
This version is also present in Barney's Bro Code as well. For instance, a bro must always, whenever possible, provide another bro with protection.
"Bros Before Hoes" is, in fact, the very first commandment of the Bro Code, as passed down by Broses.
Inverted in the Seinfeld episode "The Stranded". Jerry explains the Male Code as not only putting women over your friends, but that your friends must accept it without question and are obligated to do whatever it takes to help you hook up with the woman, no matter how much it screws them over. In the episode, Jerry allows George to take a woman home from a house party in the car, leaving him and Elaine stranded there for hours. When Elaine complains, Jerry says there was nothing he could do. "It's part of the Code."
Jerry: All plans between men are tentative. If one man should suddenly have an opportunity to pursue a woman, it's like these two guys never met each other ever in life. This is the Male Code. And it doesn't matter how important the arrangements are, I mean, most of the time when they scrub a space shuttle mission it's because one of the astronauts met someone on his way to the launch pad. They hold that countdown. He's leaning against the rocket talking to her, "So listen, when I get back what do you say we get together for some Tang?"
In Dollhouse in "The Hollow Men", Topher tells Boyd something and this ensues:
Boyd: Thank you for confiding in me Topher.
Topher: Of course. Bros before others who are... not bros.
Happy Endings has "Bros before bros", invoked when Max falls in love with the son of Dave's food truck rival. Later Max tries to make things better by getting the son to talk to his dad about ending the feud, but it backfires because the father invokes "Dads before lads".
Referenced in Glee. Finn's football teammates give him an ultimatum at one point: "Bros before hi-ho's!" (a reference to singing and Glee Club.)
Subverted in the Disney film The Three Caballeros where the theme song is all about "bros" until this verse: "Through fair and stormy weather / We stand close together / Like books on a shelf / And pals though we may be / When some Latin baby / Says yes, no, or maybe / Each man is for himself!"
Stan Smith gives this bit of knowledge to son Steve on American Dad!
A Pimp Named Slickback, however, says that there are many, many things he will put before a ho, but a bro is not one of them. In fact, a bro is pretty much the only thing he won't put before a ho.
Transformers Prime - A G-rated version in the episode "Plus One". Jack is concerned about his mother and Agent Fowler getting closer, and gets more distressed when Miko suggests Arcee (his robot Cool Big Sis) might hook up with Wheeljack. By the end of the episode, one of those fears has been put to rest.
Jack: (watching Wheeljack and Bulkhead shake hands) Bromance trumps romance.
Miko: Glad to be your bro, bro.
In Gravity Falls, it's "bros before dinos", spoken by Soos as he saves the others from dinosaurs.