...when a guy says to all his friends in a very aggressive way "ya, well my father, met dan!" and all u can do is just laugh
Way too funny!
...When you don't bother booking tickets anymore till the day of.
...When you build card towers out of credit cards, (SP as the base of course).
...When you've booked multiple hotel rooms for nights and don't stay in any of them.
...When you base your vacations on award availability.
...When your chavrusa knows there are coffee breaks and DDF breaks during seder.
...When your source on halacha/vaccines/politics/family issues etc. is from people you have never even met!