Really easily.
Usually in the sense of buying a bluff, lie, etc. someone buying something "Like discount fish" means they bought it almost instantly, without a second thought or any sort of analysis.
The term references the fact that due to its high price, people will often buy discount fish almost instantly without any consideration of its quality or why it's on discount.
Dandyman: I may or may not have of lied to the local policía that in return for your capture, I would
give them immortality.
Alucard: And they fuckin' bought that?
Dandyman: Like discount fish.
Alucard: You cheeky dick-waffle!
Telling someone you like a boys butthole
John I like bussy
When you have had the Craic so much the night before your nose erupts like Mt. Vesuvius the next day!
BP: Hey AV how's the craic
AV: Weindish I'm still weeping like a mofo all over my keyboard!
The act of portraying ones self in a manner less than suitable for the publics viewing.
Officer: "You! Who was that deranged man?"
You: "I don't know officer, He was gankst'n like a thug...I didn't see His face."
Society: "Why?!"
This can be used when you want to get out of doing hard work in school/work and also how to get sent home or fired.
Teacher: Did you finish the 10,000,000 page essay Timothy?
Timothy: “I like penis”
Teacher: OH NO, I WILL RING YOUR PARENTS RIGHT NOW TIMOTHY
A word used to change the subject in some way.
"That's not how it works!" said Mark, and Lucy replied. "You don't know either, stupid!"
"I like cheese," muttered Olivia. "Me too," replied Lucy. "Me three." said Mark.
When You Are Doing something wrong to a point where you act like a shrimp, Or Acting Wrong and Someone Comparing you to a Shrimp