Informal, but still respectful:
* Tatay: This is the most common informal term for "father." It's used by children, close family members, and friends. It's like saying "Dad" in English.
* Pa: This is a shorter and even more casual version of "Tatay," similar to "Pop" in English.
* Papa: This is a more affectionate term for "father" that's often used by children or younger people.
More casual and sometimes used among close friends:
* Pare: This word literally translates to "friend," but it's also used as a playful term for "dad" in some circles, particularly among men.
* Bay: This is a casual term for "father," but it's not as widely used as "Tatay" or "Pa."
Remember: The best way to say "father" in slang depends on the specific situation and your relationship with the person you're talking to.
It's always a good idea to use formal terms like "Ama" or "Tatay" when speaking to elders or people you don't know well.