What does in welp mean?

"Welp" is an informal interjection that expresses resignation or acceptance, often in a humorous or slightly sarcastic way. It's similar to saying:

* "Well, I guess..."

* "Oh well..."

* "Alright then..."

It's often used when something unexpected or undesirable happens, but there's not much you can do about it.

Example:

* "I forgot my wallet at home. Welp, guess I'm not eating lunch today."

The speaker acknowledges the situation and accepts it with a bit of resignation.