mooshkabob-anything random
jeezus cheezus-an exclamation e.g. you find out you got a really high test score in a subjects you're useless at. that is truly a jeezus cheezus moment.
wooble shooble-very happy/excited, used to describe yourself e.g. i was VERY wooble shooble when i was going to a red hot chili peppers concert!
monkeys in a barrel with cheese- a substitue for swearing when you realise the headteacher (principal to you americans) is right next to you, or that your 5-year-old brother has just walked in the room.
arsh garsh mcgarsh garsh-i just randomly started saying this one day and it just stuck.
i am someone with many random sayings, and when more fly into my brain cell i will list them here!