Growing up in a Filipino household, I picked up all sorts of slang terms for family members, and 'uncle' has a few fun variations. The most common one is 'Tito,' which is the standard, polite way to say it. But if you want something more casual or playful, you might hear 'Tito' shortened to 'Tiyo' or even 'Tiyong' in some regions. Among younger folks or in super relaxed settings, 'Pareng' (from 'Pare,' meaning 'dude') can be jokingly used for an uncle-like figure, especially if they’re the cool, older friend type.
One thing I love about Tagalog slang is how it adapts to relationships—like how 'Tito' can turn into 'Tito Boy' or 'Tito Mike' to add familiarity. And in super informal chats, you might even hear 'Tay' (short for 'Tatay,' meaning 'dad') used for an uncle if he’s like a father figure. It’s all about context and vibes—Filipino slang is super flexible that way.